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{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# All the Mountains"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "*Extract all postcards depicting a mountain*"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "*(as far as we know from the metadata)*"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Setup"
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "pd.set_option('display.max_columns', 100)  # Output up to 100 columns"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Load Data"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/home/kst/tmp/dingsdi/lib/python3.7/site-packages/IPython/core/interactiveshell.py:3049: DtypeWarning: Columns (13) have mixed types. Specify dtype option on import or set low_memory=False.\n",
      "  interactivity=interactivity, compiler=compiler, result=result)\n"
     ]
    }
   ],
    "df = pd.read_csv('https://labs.onb.ac.at/gitlab/labs-team/raw-metadata/raw/master/akon_postcards_public_domain.csv.bz2', compression='bz2')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## View Data"
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [
    {
     "data": {
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       "      <th></th>\n",
       "      <th>Unnamed: 0</th>\n",
       "      <th>akon_id</th>\n",
       "      <th>id</th>\n",
       "      <th>altitude</th>\n",
       "      <th>building</th>\n",
       "      <th>city</th>\n",
       "      <th>color</th>\n",
       "      <th>comment</th>\n",
       "      <th>mountain</th>\n",
       "      <th>other</th>\n",
       "      <th>photographer</th>\n",
       "      <th>publisher</th>\n",
       "      <th>publisher_place</th>\n",
       "      <th>region</th>\n",
       "      <th>water_body</th>\n",
       "      <th>year</th>\n",
       "      <th>inventory_number</th>\n",
       "      <th>signature</th>\n",
       "      <th>revision_date</th>\n",
       "      <th>date</th>\n",
       "      <th>feature_class</th>\n",
       "      <th>feature_code</th>\n",
       "      <th>geoname_id</th>\n",
       "      <th>latitude</th>\n",
       "      <th>longitude</th>\n",
       "      <th>name</th>\n",
       "      <th>country_id</th>\n",
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       "      <th>admin_code_1</th>\n",
       "      <th>geo</th>\n",
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       "      <th>download_link_256x256</th>\n",
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       "      <td>7125</td>\n",
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       "      <td>False</td>\n",
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       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
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       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-03 12:10:00.735</td>\n",
       "      <td>gelaufen 1911</td>\n",
       "      <td>P</td>\n",
       "      <td>PPL</td>\n",
       "      <td>2759899.0</td>\n",
       "      <td>52.63167</td>\n",
       "      <td>4.74861</td>\n",
       "      <td>Alkmaar</td>\n",
       "      <td>NL</td>\n",
       "      <td>Nord-Holland</td>\n",
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       "      <td>https://iiif.onb.ac.at/images/AKON/AK103_180/1...</td>\n",
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       "      <td>Stuttgart</td>\n",
       "      <td>False</td>\n",
       "      <td>1913 gel</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Schaller</td>\n",
       "      <td>Stuttgart</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-08-25 14:42:50.107</td>\n",
       "      <td>gelaufen 1913</td>\n",
       "      <td>P</td>\n",
       "      <td>PPLA</td>\n",
       "      <td>2825297.0</td>\n",
       "      <td>48.78232</td>\n",
       "      <td>9.17702</td>\n",
       "      <td>Stuttgart</td>\n",
       "      <td>DE</td>\n",
       "      <td>Baden-Württemberg</td>\n",
       "      <td>01</td>\n",
       "      <td>48.78232, 9.17702</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK080_116/1...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK080_116/1...</td>\n",
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       "    <tr>\n",
       "      <th>9180</th>\n",
       "      <td>9180</td>\n",
       "      <td>AK092_417</td>\n",
       "      <td>58634</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Frankfurt a. M., Goetheplatz</td>\n",
       "      <td>False</td>\n",
       "      <td>v 1905</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Kiement</td>\n",
       "      <td>Frankfurt a. M.</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Geogr. Topogr. Bilder-Samml. 1943, 13602</td>\n",
       "      <td>2014-09-01 10:38:38.387</td>\n",
       "      <td>vor 1905</td>\n",
       "      <td>P</td>\n",
       "      <td>PPLA3</td>\n",
       "      <td>2925533.0</td>\n",
       "      <td>50.11552</td>\n",
       "      <td>8.68417</td>\n",
       "      <td>Frankfurt am Main</td>\n",
       "      <td>DE</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>50.11552, 8.68417</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK092_417/4...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK092_417/4...</td>\n",
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       "    <tr>\n",
       "      <th>14579</th>\n",
       "      <td>14579</td>\n",
       "      <td>AK009_594</td>\n",
       "      <td>5432</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Mariazell</td>\n",
       "      <td>False</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Oetscher</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Ledermann</td>\n",
       "      <td>Wien</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-08-04 07:59:09.936</td>\n",
       "      <td>1922</td>\n",
       "      <td>P</td>\n",
       "      <td>PPLA3</td>\n",
       "      <td>2771893.0</td>\n",
       "      <td>47.77306</td>\n",
       "      <td>15.31639</td>\n",
       "      <td>Mariazell</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.77306, 15.31639</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK009_594/5...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK009_594/5...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>15018</th>\n",
       "      <td>15018</td>\n",
       "      <td>AK011_064</td>\n",
       "      <td>6115</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Waidhofen an der Ybbs</td>\n",
       "      <td>True</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Herzig</td>\n",
       "      <td>Waidhofen a. d. Ybbs</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-08-04 07:59:09.959</td>\n",
       "      <td>1913</td>\n",
       "      <td>P</td>\n",
       "      <td>PPLA3</td>\n",
       "      <td>2762077.0</td>\n",
       "      <td>47.96004</td>\n",
       "      <td>14.77361</td>\n",
       "      <td>Waidhofen an der Ybbs</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.96004, 14.77361</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK011_064/0...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK011_064/0...</td>\n",
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      ],
      "text/plain": [
       "       Unnamed: 0    akon_id     id  altitude     building  \\\n",
       "7125         7125  AK103_180  67901       NaN  Laurenskerk   \n",
       "6850         6850  AK080_116  49953       NaN          NaN   \n",
       "9180         9180  AK092_417  58634       NaN          NaN   \n",
       "14579       14579  AK009_594   5432       NaN          NaN   \n",
       "15018       15018  AK011_064   6115       NaN          NaN   \n",
       "                               city  color    comment  mountain other  \\\n",
       "7125                        Alkmaar  False  gel. 1911       NaN   NaN   \n",
       "6850                      Stuttgart  False   1913 gel       NaN   NaN   \n",
       "9180   Frankfurt a. M., Goetheplatz  False     v 1905       NaN   NaN   \n",
       "14579                     Mariazell  False        NaN  Oetscher   NaN   \n",
       "15018         Waidhofen an der Ybbs   True        NaN       NaN   NaN   \n",
       "      photographer  publisher       publisher_place region water_body    year  \\\n",
       "7125           NaN        NaN                   NaN    NaN        NaN     NaN   \n",
       "6850           NaN   Schaller             Stuttgart    NaN        NaN     NaN   \n",
       "9180           NaN    Kiement       Frankfurt a. M.    NaN        NaN     NaN   \n",
       "14579          NaN  Ledermann                  Wien    NaN        NaN  1922.0   \n",
       "15018          NaN     Herzig  Waidhofen a. d. Ybbs    NaN        NaN  1913.0   \n",
       "      inventory_number                                 signature  \\\n",
       "7125           79/59 K                                       NaN   \n",
       "6850               NaN                                       NaN   \n",
       "9180               NaN  Geogr. Topogr. Bilder-Samml. 1943, 13602   \n",
       "14579              NaN                                       NaN   \n",
       "15018              NaN                                       NaN   \n",
       "\n",
       "                 revision_date           date feature_class feature_code  \\\n",
       "7125   2014-09-03 12:10:00.735  gelaufen 1911             P          PPL   \n",
       "6850   2014-08-25 14:42:50.107  gelaufen 1913             P         PPLA   \n",
       "9180   2014-09-01 10:38:38.387       vor 1905             P        PPLA3   \n",
       "14579  2014-08-04 07:59:09.936           1922             P        PPLA3   \n",
       "15018  2014-08-04 07:59:09.959           1913             P        PPLA3   \n",
       "\n",
       "       geoname_id  latitude  longitude                   name country_id  \\\n",
       "7125    2759899.0  52.63167    4.74861                Alkmaar         NL   \n",
       "6850    2825297.0  48.78232    9.17702              Stuttgart         DE   \n",
       "9180    2925533.0  50.11552    8.68417      Frankfurt am Main         DE   \n",
       "14579   2771893.0  47.77306   15.31639              Mariazell         AT   \n",
       "15018   2762077.0  47.96004   14.77361  Waidhofen an der Ybbs         AT   \n",
       "            admin_name_1 admin_code_1                 geo  \\\n",
       "7125        Nord-Holland           07   52.63167, 4.74861   \n",
       "6850   Baden-Württemberg           01   48.78232, 9.17702   \n",
       "9180                 NaN          NaN   50.11552, 8.68417   \n",
       "14579                NaN          NaN  47.77306, 15.31639   \n",
       "15018                NaN          NaN  47.96004, 14.77361   \n",
       "                                           download_link  \\\n",
       "7125   https://iiif.onb.ac.at/images/AKON/AK103_180/1...   \n",
       "6850   https://iiif.onb.ac.at/images/AKON/AK080_116/1...   \n",
       "9180   https://iiif.onb.ac.at/images/AKON/AK092_417/4...   \n",
       "14579  https://iiif.onb.ac.at/images/AKON/AK009_594/5...   \n",
       "15018  https://iiif.onb.ac.at/images/AKON/AK011_064/0...   \n",
       "\n",
       "                                   download_link_256x256  \n",
       "7125   https://iiif.onb.ac.at/images/AKON/AK103_180/1...  \n",
       "6850   https://iiif.onb.ac.at/images/AKON/AK080_116/1...  \n",
       "9180   https://iiif.onb.ac.at/images/AKON/AK092_417/4...  \n",
       "14579  https://iiif.onb.ac.at/images/AKON/AK009_594/5...  \n",
       "15018  https://iiif.onb.ac.at/images/AKON/AK011_064/0...  "
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "df.sample(5)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Filter Mountains"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Rows without an identified mountain have `'NaN'` in the column `'mountain'`"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can filter by those having NaN by using `'isnull'`:"
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "len(df)"
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "len(df[ df['mountain'].isnull() ])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "and reverse the filter, so we get all rows where the 'mountain' entry *is not NaN*.\n",
    "\n",
    "Note that `'~'` means a logical *not*.\n",
    "\n",
    "Also note that the filter has to be inside parentheses."
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "len(df[ ~ (df['mountain'].isnull()) ])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "And now let's save the result."
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [],
   "source": [
    "mountains = df[ ~ (df['mountain'].isnull()) ]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Take a look at the data"
   ]
  },
  {
   "cell_type": "code",
   "metadata": {},
   "outputs": [
    {
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       "      <th>akon_id</th>\n",
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       "      <th>color</th>\n",
       "      <th>comment</th>\n",
       "      <th>mountain</th>\n",
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       "      <th>photographer</th>\n",
       "      <th>publisher</th>\n",
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       "      <th>region</th>\n",
       "      <th>water_body</th>\n",
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       "      <th>7485</th>\n",
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       "      <td>vor 1905</td>\n",
       "      <td>T</td>\n",
       "      <td>PKS</td>\n",
       "      <td>3165272.0</td>\n",
       "      <td>46.61900</td>\n",
       "      <td>12.30185</td>\n",
       "      <td>Drei Zinnen</td>\n",
       "      <td>IT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
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       "      <td>https://iiif.onb.ac.at/images/AKON/AK084_275/2...</td>\n",
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       "      <th>13042</th>\n",
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       "      <td>NaN</td>\n",
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       "      <td>False</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Schareck</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Gutenberghaus</td>\n",
       "      <td>Klagenfurt</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Bärenfall</td>\n",
       "      <td>1911.0</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-08-04 07:59:09.851</td>\n",
       "      <td>1911</td>\n",
       "      <td>T</td>\n",
       "      <td>PASS</td>\n",
       "      <td>2766151.0</td>\n",
       "      <td>47.04180</td>\n",
       "      <td>13.01590</td>\n",
       "      <td>Schareck</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.0418, 13.0159</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK006_027/0...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK006_027/0...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>31375</th>\n",
       "      <td>31375</td>\n",
       "      <td>AK100_503</td>\n",
       "      <td>64754</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Rifugio Bolognini</td>\n",
       "      <td>NaN</td>\n",
       "      <td>False</td>\n",
       "      <td>1899</td>\n",
       "      <td>Bedole</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-03 07:13:16.993</td>\n",
       "      <td>gelaufen 1899</td>\n",
       "      <td>T</td>\n",
       "      <td>PK</td>\n",
       "      <td>6696180.0</td>\n",
       "      <td>46.18410</td>\n",
       "      <td>11.80228</td>\n",
       "      <td>Bedole</td>\n",
       "      <td>IT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>46.1841, 11.80228</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK100_503/5...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK100_503/5...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2166</th>\n",
       "      <td>2166</td>\n",
       "      <td>AK114_236</td>\n",
       "      <td>76661</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Stutenhaus, Berghotel Adlersberg</td>\n",
       "      <td>Vesser</td>\n",
       "      <td>False</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Adlersberg</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>1907.0</td>\n",
       "      <td>13/41 G. KA.</td>\n",
       "      <td>Geographisch-topographische Bildersammlung 293...</td>\n",
       "      <td>2014-09-09 09:01:30.828</td>\n",
       "      <td>1907</td>\n",
       "      <td>P</td>\n",
       "      <td>PPL</td>\n",
       "      <td>2817527.0</td>\n",
       "      <td>50.59519</td>\n",
       "      <td>10.78953</td>\n",
       "      <td>Vesser</td>\n",
       "      <td>DE</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>50.59519, 10.78953</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK114_236/2...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK114_236/2...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4432</th>\n",
       "      <td>4432</td>\n",
       "      <td>AK048_462</td>\n",
       "      <td>28904</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Habsburghaus</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Rax</td>\n",
       "      <td>Alpengarten</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Ledermann</td>\n",
       "      <td>Wien</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>1908.0</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-16 11:05:32.590</td>\n",
       "      <td>1908</td>\n",
       "      <td>S</td>\n",
       "      <td>HTL</td>\n",
       "      <td>2777118.0</td>\n",
       "      <td>47.73333</td>\n",
       "      <td>15.70000</td>\n",
       "      <td>Habsburghaus</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.73333, 15.7</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK048_462/4...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK048_462/4...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>31396</th>\n",
       "      <td>31396</td>\n",
       "      <td>AK101_239</td>\n",
       "      <td>65894</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>False</td>\n",
       "      <td>v. 1907</td>\n",
       "      <td>Urner Alpen</td>\n",
       "      <td>Rhonegletscher</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-03 08:27:15.774</td>\n",
       "      <td>vor 1907</td>\n",
       "      <td>H</td>\n",
       "      <td>GLCR</td>\n",
       "      <td>2659056.0</td>\n",
       "      <td>46.60454</td>\n",
       "      <td>8.38605</td>\n",
       "      <td>Rhonegletscher</td>\n",
       "      <td>CH</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>46.60454, 8.38605</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK101_239/2...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK101_239/2...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>23714</th>\n",
       "      <td>23714</td>\n",
       "      <td>AK043_519</td>\n",
       "      <td>25852</td>\n",
       "      <td>959.0</td>\n",
       "      <td>Jubiläumswarte</td>\n",
       "      <td>NaN</td>\n",
       "      <td>True</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Jauerling</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Ledermann</td>\n",
       "      <td>Wien</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-08-04 07:59:10.342</td>\n",
       "      <td>1912</td>\n",
       "      <td>T</td>\n",
       "      <td>MT</td>\n",
       "      <td>2775112.0</td>\n",
       "      <td>48.34098</td>\n",
       "      <td>15.34050</td>\n",
       "      <td>Jauerling Gipfelkreuz</td>\n",
       "      <td>AT</td>\n",
       "      <td>Niederösterreich</td>\n",
       "      <td>03</td>\n",
       "      <td>48.34098, 15.3405</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK043_519/5...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK043_519/5...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>33482</th>\n",
       "      <td>33482</td>\n",
       "      <td>AK097_371</td>\n",
       "      <td>62297</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>False</td>\n",
       "      <td>1905 gel</td>\n",
       "      <td>Kaiser Franz-Josef-Spitze</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-02 11:19:10.995</td>\n",
       "      <td>vor 1905</td>\n",
       "      <td>T</td>\n",
       "      <td>PASS</td>\n",
       "      <td>3180988.0</td>\n",
       "      <td>46.23970</td>\n",
       "      <td>10.84110</td>\n",
       "      <td>Campo Carlo Magno</td>\n",
       "      <td>IT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>46.2397, 10.8411</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK097_371/3...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK097_371/3...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>25652</th>\n",
       "      <td>25652</td>\n",
       "      <td>AK034_222</td>\n",
       "      <td>20139</td>\n",
       "      <td>442.0</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Gloggnitz</td>\n",
       "      <td>False</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Rax, Feuchter</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Ledermann</td>\n",
       "      <td>Wien</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>2014-09-16 11:11:53.011</td>\n",
       "      <td>1918</td>\n",
       "      <td>P</td>\n",
       "      <td>PPLA3</td>\n",
       "      <td>2778455.0</td>\n",
       "      <td>47.67487</td>\n",
       "      <td>15.93893</td>\n",
       "      <td>Gloggnitz</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.67487, 15.93893</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK034_222/2...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK034_222/2...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>28730</th>\n",
       "      <td>28730</td>\n",
       "      <td>AK064_513</td>\n",
       "      <td>39161</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Hallein</td>\n",
       "      <td>False</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Tennengebirge</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Huttegger</td>\n",
       "      <td>Salzburg</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>1916.0</td>\n",
       "      <td>NaN</td>\n",
       "      <td>Geographisch-topographische Bildersammlung I. ...</td>\n",
       "      <td>2015-04-15 10:58:33.373</td>\n",
       "      <td>1916</td>\n",
       "      <td>T</td>\n",
       "      <td>MTS</td>\n",
       "      <td>2763805.0</td>\n",
       "      <td>47.50000</td>\n",
       "      <td>13.25000</td>\n",
       "      <td>Tennengebirge</td>\n",
       "      <td>AT</td>\n",
       "      <td>NaN</td>\n",
       "      <td>NaN</td>\n",
       "      <td>47.5, 13.25</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK064_513/5...</td>\n",
       "      <td>https://iiif.onb.ac.at/images/AKON/AK064_513/5...</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "       Unnamed: 0    akon_id     id  altitude  \\\n",
       "7485         7485  AK084_275  52992       NaN   \n",
       "13042       13042  AK006_027   3076       NaN   \n",
       "31375       31375  AK100_503  64754       NaN   \n",
       "2166         2166  AK114_236  76661       NaN   \n",
       "4432         4432  AK048_462  28904       NaN   \n",
       "31396       31396  AK101_239  65894       NaN   \n",
       "23714       23714  AK043_519  25852     959.0   \n",
       "33482       33482  AK097_371  62297       NaN   \n",
       "25652       25652  AK034_222  20139     442.0   \n",
       "28730       28730  AK064_513  39161       NaN   \n",
       "\n",
       "                               building       city  color   comment  \\\n",
       "7485                                NaN        NaN  False    v 1905   \n",
       "13042                               NaN        NaN  False       NaN   \n",
       "31375                 Rifugio Bolognini        NaN  False     1899    \n",
       "2166   Stutenhaus, Berghotel Adlersberg     Vesser  False       NaN   \n",
       "4432                       Habsburghaus        NaN   True       NaN   \n",
       "31396                               NaN     Wallis  False   v. 1907   \n",
       "23714                    Jubiläumswarte        NaN   True       NaN   \n",
       "33482                               NaN     Brenta  False  1905 gel   \n",
       "25652                               NaN  Gloggnitz  False       NaN   \n",
       "28730                               NaN    Hallein  False       NaN   \n",
       "\n",
       "                        mountain           other photographer      publisher  \\\n",
       "7485                 Drei Zinnen             NaN          NaN  Photoglob Co.   \n",
       "13042                   Schareck             NaN          NaN  Gutenberghaus   \n",
       "31375                     Bedole             NaN          NaN            NaN   \n",
       "2166                  Adlersberg             NaN          NaN            NaN   \n",
       "4432                         Rax     Alpengarten          NaN      Ledermann   \n",
       "31396                Urner Alpen  Rhonegletscher          NaN            NaN   \n",
       "23714                  Jauerling             NaN          NaN      Ledermann   \n",
       "33482  Kaiser Franz-Josef-Spitze             NaN          NaN            NaN   \n",
       "25652              Rax, Feuchter             NaN          NaN      Ledermann   \n",
       "28730              Tennengebirge             NaN          NaN      Huttegger   \n",
       "\n",
       "      publisher_place region water_body    year inventory_number  \\\n",
       "7485           Zürich    NaN        NaN     NaN              NaN   \n",
       "13042      Klagenfurt    NaN  Bärenfall  1911.0              NaN   \n",
       "31375             NaN    NaN        NaN     NaN          79/66 G   \n",
       "2166              NaN    NaN        NaN  1907.0     13/41 G. KA.   \n",
       "4432             Wien    NaN        NaN  1908.0              NaN   \n",
       "31396             NaN    NaN        NaN     NaN          79/66 G   \n",
       "23714            Wien    NaN        NaN  1912.0              NaN   \n",
       "33482             NaN    NaN        NaN     NaN              NaN   \n",
       "25652            Wien    NaN        NaN  1918.0              NaN   \n",
       "28730        Salzburg    NaN        NaN  1916.0              NaN   \n",
       "                                               signature  \\\n",
       "7485                                                 NaN   \n",
       "13042                                                NaN   \n",
       "31375                                                NaN   \n",
       "2166   Geographisch-topographische Bildersammlung 293...   \n",
       "4432                                                 NaN   \n",
       "31396                                                NaN   \n",
       "23714                                                NaN   \n",
       "33482                                                NaN   \n",
       "25652                                                NaN   \n",
       "28730  Geographisch-topographische Bildersammlung I. ...   \n",
       "                 revision_date           date feature_class feature_code  \\\n",
       "7485   2014-08-27 10:53:09.020       vor 1905             T          PKS   \n",
       "13042  2014-08-04 07:59:09.851           1911             T         PASS   \n",
       "31375  2014-09-03 07:13:16.993  gelaufen 1899             T           PK   \n",
       "2166   2014-09-09 09:01:30.828           1907             P          PPL   \n",
       "4432   2014-09-16 11:05:32.590           1908             S          HTL   \n",
       "31396  2014-09-03 08:27:15.774       vor 1907             H         GLCR   \n",
       "23714  2014-08-04 07:59:10.342           1912             T           MT   \n",
       "33482  2014-09-02 11:19:10.995       vor 1905             T         PASS   \n",
       "25652  2014-09-16 11:11:53.011           1918             P        PPLA3   \n",
       "28730  2015-04-15 10:58:33.373           1916             T          MTS   \n",
       "       geoname_id  latitude  longitude                   name country_id  \\\n",
       "7485    3165272.0  46.61900   12.30185            Drei Zinnen         IT   \n",
       "13042   2766151.0  47.04180   13.01590               Schareck         AT   \n",
       "31375   6696180.0  46.18410   11.80228                 Bedole         IT   \n",
       "2166    2817527.0  50.59519   10.78953                 Vesser         DE   \n",
       "4432    2777118.0  47.73333   15.70000           Habsburghaus         AT   \n",
       "31396   2659056.0  46.60454    8.38605         Rhonegletscher         CH   \n",
       "23714   2775112.0  48.34098   15.34050  Jauerling Gipfelkreuz         AT   \n",
       "33482   3180988.0  46.23970   10.84110      Campo Carlo Magno         IT   \n",
       "25652   2778455.0  47.67487   15.93893              Gloggnitz         AT   \n",
       "28730   2763805.0  47.50000   13.25000          Tennengebirge         AT   \n",