What is KML?
ℹ️ Definition: The Keyhole Markup Language (KML) is a file format for displaying geographic data in Google Earth or other so-called “Earth Browsers”. Similarly to XML, KML uses a tag-based structure with nested elements and attributes.
How to Convert KML to CSV in Python?
You can convert a .kml to a .csv file in Python by using the BeautifulSoup and the csv libraries. You use the former to read the XML-structured KML file and the latter to write the CSV file row by row.
Here’s the code example inspired but modified from this GitHub repository. You can copy&paste it in the directory where your KML file resides and change the input and output filenames at the beginning to convert your own KML to a CSV in Python:
from bs4 import BeautifulSoup
import csv
infile = 'my_file.kml'
outfile = 'my_file.csv'
with open(infile, 'r') as f:
s = BeautifulSoup(f, 'xml')
with open(outfile, 'wb') as csvfile:
writer = csv.writer(csvfile)
for coords in s.find_all('coordinates'):
# Take coordinate string from KML and break it up into [Lat,Lon,Lat,Lon...] to get CSV row
space_splits = coords.string.split(" ")
row = []
for split in space_splits[1:]:
# Note: because of the space between <coordinates>" "-80.123, we slice [1:]
comma_split = split.split(',')
# lattitude
row.append(comma_split[1])
# longitude
row.append(comma_split[0])
writer.writerow(row)
Example Conversion
We use the following sample KML file as 'my_file.kml':
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<name>KML Samples</name>
<open>1</open>
<description>Unleash your creativity with the help of these examples!</description>
<Style id="downArrowIcon">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pal4/icon28.png</href>
</Icon>
</IconStyle>
</Style>
<Style id="globeIcon">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pal3/icon19.png</href>
</Icon>
</IconStyle>
<LineStyle>
<width>2</width>
</LineStyle>
</Style>
<Style id="transPurpleLineGreenPoly">
<LineStyle>
<color>7fff00ff</color>
<width>4</width>
</LineStyle>
<PolyStyle>
<color>7f00ff00</color>
</PolyStyle>
</Style>
<Style id="yellowLineGreenPoly">
<LineStyle>
<color>7f00ffff</color>
<width>4</width>
</LineStyle>
<PolyStyle>
<color>7f00ff00</color>
</PolyStyle>
</Style>
<Style id="thickBlackLine">
<LineStyle>
<color>87000000</color>
<width>10</width>
</LineStyle>
</Style>
<Style id="redLineBluePoly">
<LineStyle>
<color>ff0000ff</color>
</LineStyle>
<PolyStyle>
<color>ffff0000</color>
</PolyStyle>
</Style>
<Style id="blueLineRedPoly">
<LineStyle>
<color>ffff0000</color>
</LineStyle>
<PolyStyle>
<color>ff0000ff</color>
</PolyStyle>
</Style>
<Style id="transRedPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d0000ff</color>
</PolyStyle>
</Style>
<Style id="transBluePoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7dff0000</color>
</PolyStyle>
</Style>
<Style id="transGreenPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d00ff00</color>
</PolyStyle>
</Style>
<Style id="transYellowPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d00ffff</color>
</PolyStyle>
</Style>
<Style id="noDrivingDirections">
<BalloonStyle>
<text><![CDATA[
<b>$[name]</b>
<br /><br />
$[description]
]]></text>
</BalloonStyle>
</Style>
<Folder>
<name>Placemarks</name>
<description>These are just some of the different kinds of placemarks with
which you can mark your favorite places</description>
<LookAt>
<longitude>-122.0839597145766</longitude>
<latitude>37.42222904525232</latitude>
<altitude>0</altitude>
<heading>-148.4122922628044</heading>
<tilt>40.5575073395506</tilt>
<range>500.6566641072245</range>
</LookAt>
<Placemark>
<name>Simple placemark</name>
<description>Attached to the ground. Intelligently places itself at the
height of the underlying terrain.</description>
<Point>
<coordinates>-122.0822035425683,37.42228990140251,0</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Floating placemark</name>
<visibility>0</visibility>
<description>Floats a defined distance above the ground.</description>
<LookAt>
<longitude>-122.0839597145766</longitude>
<latitude>37.42222904525232</latitude>
<altitude>0</altitude>
<heading>-148.4122922628044</heading>
<tilt>40.5575073395506</tilt>
<range>500.6566641072245</range>
</LookAt>
<styleUrl>#downArrowIcon</styleUrl>
<Point>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates>-122.084075,37.4220033612141,50</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Extruded placemark</name>
<visibility>0</visibility>
<description>Tethered to the ground by a customizable
"tail"</description>
<LookAt>
<longitude>-122.0845787421525</longitude>
<latitude>37.42215078737763</latitude>
<altitude>0</altitude>
<heading>-148.4126684946234</heading>
<tilt>40.55750733918048</tilt>
<range>365.2646606980322</range>
</LookAt>
<styleUrl>#globeIcon</styleUrl>
<Point>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates>-122.0857667006183,37.42156927867553,50</coordinates>
</Point>
</Placemark>
</Folder>
<Folder>
<name>Styles and Markup</name>
<visibility>0</visibility>
<description>With KML it is easy to create rich, descriptive markup to
annotate and enrich your placemarks</description>
<LookAt>
<longitude>-122.0845787422371</longitude>
<latitude>37.42215078726837</latitude>
<altitude>0</altitude>
<heading>-148.4126777488172</heading>
<tilt>40.55750733930874</tilt>
<range>365.2646826292919</range>
</LookAt>
<styleUrl>#noDrivingDirections</styleUrl>
<Document>
<name>Highlighted Icon</name>
<visibility>0</visibility>
<description>Place your mouse over the icon to see it display the new
icon</description>
<LookAt>
<longitude>-122.0856552124024</longitude>
<latitude>37.4224281311035</latitude>
<altitude>0</altitude>
<heading>0</heading>
<tilt>0</tilt>
<range>265.8520424250024</range>
</LookAt>
<Style id="highlightPlacemark">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/paddle/red-stars.png</href>
</Icon>
</IconStyle>
</Style>
<Style id="normalPlacemark">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/paddle/wht-blank.png</href>
</Icon>
</IconStyle>
</Style>
<StyleMap id="exampleStyleMap">
<Pair>
<key>normal</key>
<styleUrl>#normalPlacemark</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#highlightPlacemark</styleUrl>
</Pair>
</StyleMap>
<Placemark>
<name>Roll over this icon</name>
<visibility>0</visibility>
<styleUrl>#exampleStyleMap</styleUrl>
<Point>
<coordinates>-122.0856545755255,37.42243077405461,0</coordinates>
</Point>
</Placemark>
</Document>
<Placemark>
<name>Descriptive HTML</name>
<visibility>0</visibility>
<description><![CDATA[Click on the blue link!<br><br>
Placemark descriptions can be enriched by using many standard HTML tags.<br>
For example:
<hr>
Styles:<br>
<i>Italics</i>,
<b>Bold</b>,
<u>Underlined</u>,
<s>Strike Out</s>,
subscript<sub>subscript</sub>,
superscript<sup>superscript</sup>,
<big>Big</big>,
<small>Small</small>,
<tt>Typewriter</tt>,
<em>Emphasized</em>,
<strong>Strong</strong>,
<code>Code</code>
<hr>
Fonts:<br>
<font color="red">red by name</font>,
<font color="#408010">leaf green by hexadecimal RGB</font>
<br>
<font size=1>size 1</font>,
<font size=2>size 2</font>,
<font size=3>size 3</font>,
<font size=4>size 4</font>,
<font size=5>size 5</font>,
<font size=6>size 6</font>,
<font size=7>size 7</font>
<br>
<font face=times>Times</font>,
<font face=verdana>Verdana</font>,
<font face=arial>Arial</font><br>
<hr>
Links:
<br>
<a href="http://earth.google.com/">Google Earth!</a>
<br>
or: Check out our website at www.google.com
<hr>
Alignment:<br>
<p align=left>left</p>
<p align=center>center</p>
<p align=right>right</p>
<hr>
Ordered Lists:<br>
<ol><li>First</li><li>Second</li><li>Third</li></ol>
<ol type="a"><li>First</li><li>Second</li><li>Third</li></ol>
<ol type="A"><li>First</li><li>Second</li><li>Third</li></ol>
<hr>
Unordered Lists:<br>
<ul><li>A</li><li>B</li><li>C</li></ul>
<ul type="circle"><li>A</li><li>B</li><li>C</li></ul>
<ul type="square"><li>A</li><li>B</li><li>C</li></ul>
<hr>
Definitions:<br>
<dl>
<dt>Google:</dt><dd>The best thing since sliced bread</dd>
</dl>
<hr>
Centered:<br><center>
Time present and time past<br>
Are both perhaps present in time future,<br>
And time future contained in time past.<br>
If all time is eternally present<br>
All time is unredeemable.<br>
</center>
<hr>
Block Quote:
<br>
<blockquote>
We shall not cease from exploration<br>
And the end of all our exploring<br>
Will be to arrive where we started<br>
And know the place for the first time.<br>
<i>-- T.S. Eliot</i>
</blockquote>
<br>
<hr>
Headings:<br>
<h1>Header 1</h1>
<h2>Header 2</h2>
<h3>Header 3</h3>
<h3>Header 4</h4>
<h3>Header 5</h5>
<hr>
Images:<br>
<i>Remote image</i><br>
<img src="//developers.google.com/kml/documentation/images/googleSample.png"><br>
<i>Scaled image</i><br>
<img src="//developers.google.com/kml/documentation/images/googleSample.png" width=100><br>
<hr>
Simple Tables:<br>
<table border="1" padding="1">
<tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td></tr>
<tr><td>a</td><td>b</td><td>c</td><td>d</td><td>e</td></tr>
</table>
<br>
[Did you notice that double-clicking on the placemark doesn't cause the viewer to take you anywhere? This is because it is possible to directly author a "placeless placemark". If you look at the code for this example, you will see that it has neither a point coordinate nor a LookAt element.]]]></description>
</Placemark>
</Folder>
<Folder>
<name>Ground Overlays</name>
<visibility>0</visibility>
<description>Examples of ground overlays</description>
<GroundOverlay>
<name>Large-scale overlay on terrain</name>
<visibility>0</visibility>
<description>Overlay shows Mount Etna erupting on July 13th, 2001.</description>
<LookAt>
<longitude>15.02468937557116</longitude>
<latitude>37.67395167941667</latitude>
<altitude>0</altitude>
<heading>-16.5581842842829</heading>
<tilt>58.31228652890705</tilt>
<range>30350.36838438907</range>
</LookAt>
<Icon>
<href>http://developers.google.com/kml/documentation/images/etna.jpg</href>
</Icon>
<LatLonBox>
<north>37.91904192681665</north>
<south>37.46543388598137</south>
<east>15.35832653742206</east>
<west>14.60128369746704</west>
<rotation>-0.1556640799496235</rotation>
</LatLonBox>
</GroundOverlay>
</Folder>
<Folder>
<name>Screen Overlays</name>
<visibility>0</visibility>
<description>Screen overlays have to be authored directly in KML. These
examples illustrate absolute and dynamic positioning in screen space.</description>
<ScreenOverlay>
<name>Simple crosshairs</name>
<visibility>0</visibility>
<description>This screen overlay uses fractional positioning to put the
image in the exact center of the screen</description>
<Icon>
<href>http://developers.google.com/kml/documentation/images/crosshairs.png</href>
</Icon>
<overlayXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<screenXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<rotationXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="pixels" yunits="pixels"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Top left</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/top_left.jpg</href>
</Icon>
<overlayXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Top right</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/top_right.jpg</href>
</Icon>
<overlayXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Bottom left</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/bottom_left.jpg</href>
</Icon>
<overlayXY x="0" y="-1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Bottom right</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/bottom_right.jpg</href>
</Icon>
<overlayXY x="1" y="-1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="0" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Dynamic Positioning: Top of screen</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/dynamic_screenoverlay.jpg</href>
</Icon>
<overlayXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="1" y="0.2" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Dynamic Positioning: Right of screen</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/dynamic_right.jpg</href>
</Icon>
<overlayXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="1" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
</Folder>
<Folder>
<name>Paths</name>
<visibility>0</visibility>
<description>Examples of paths. Note that the tessellate tag is by default
set to 0. If you want to create tessellated lines, they must be authored
(or edited) directly in KML.</description>
<Placemark>
<name>Tessellated</name>
<visibility>0</visibility>
<description><![CDATA[If the <tessellate> tag has a value of 1, the line will contour to the underlying terrain]]></description>
<LookAt>
<longitude>-112.0822680013139</longitude>
<latitude>36.09825589333556</latitude>
<altitude>0</altitude>
<heading>103.8120432044965</heading>
<tilt>62.04855796276328</tilt>
<range>2889.145007690472</range>
</LookAt>
<LineString>
<tessellate>1</tessellate>
<coordinates> -112.0814237830345,36.10677870477137,0
-112.0870267752693,36.0905099328766,0 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Untessellated</name>
<visibility>0</visibility>
<description><![CDATA[If the <tessellate> tag has a value of 0, the line follow a simple straight-line path from point to point]]></description>
<LookAt>
<longitude>-112.0822680013139</longitude>
<latitude>36.09825589333556</latitude>
<altitude>0</altitude>
<heading>103.8120432044965</heading>
<tilt>62.04855796276328</tilt>
<range>2889.145007690472</range>
</LookAt>
<LineString>
<tessellate>0</tessellate>
<coordinates> -112.080622229595,36.10673460007995,0
-112.085242575315,36.09049598612422,0 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Absolute</name>
<visibility>0</visibility>
<description>Transparent purple line</description>
<LookAt>
<longitude>-112.2719329043177</longitude>
<latitude>36.08890633450894</latitude>
<altitude>0</altitude>
<heading>-106.8161545998597</heading>
<tilt>44.60763714063257</tilt>
<range>2569.386744398339</range>
</LookAt>
<styleUrl>#transPurpleLineGreenPoly</styleUrl>
<LineString>
<tessellate>1</tessellate>
<altitudeMode>absolute</altitudeMode>
<coordinates> -112.265654928602,36.09447672602546,2357
-112.2660384528238,36.09342608838671,2357
-112.2668139013453,36.09251058776881,2357
-112.2677826834445,36.09189827357996,2357
-112.2688557510952,36.0913137941187,2357
-112.2694810717219,36.0903677207521,2357
-112.2695268555611,36.08932171487285,2357
-112.2690144567276,36.08850916060472,2357
-112.2681528815339,36.08753813597956,2357
-112.2670588176031,36.08682685262568,2357
-112.2657374587321,36.08646312301303,2357 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Absolute Extruded</name>
<visibility>0</visibility>
<description>Transparent green wall with yellow outlines</description>
<LookAt>
<longitude>-112.2643334742529</longitude>
<latitude>36.08563154742419</latitude>
<altitude>0</altitude>
<heading>-125.7518698668815</heading>
<tilt>44.61038665812578</tilt>
<range>4451.842204068102</range>
</LookAt>
<styleUrl>#yellowLineGreenPoly</styleUrl>
<LineString>
<extrude>1</extrude>
<tessellate>1</tessellate>
<altitudeMode>absolute</altitudeMode>
<coordinates> -112.2550785337791,36.07954952145647,2357
-112.2549277039738,36.08117083492122,2357
-112.2552505069063,36.08260761307279,2357
-112.2564540158376,36.08395660588506,2357
-112.2580238976449,36.08511401044813,2357
-112.2595218489022,36.08584355239394,2357
-112.2608216347552,36.08612634548589,2357
-112.262073428656,36.08626019085147,2357
-112.2633204928495,36.08621519860091,2357
-112.2644963846444,36.08627897945274,2357
-112.2656969554589,36.08649599090644,2357 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Relative</name>
<visibility>0</visibility>
<description>Black line (10 pixels wide), height tracks terrain</description>
<LookAt>
<longitude>-112.2580438551384</longitude>
<latitude>36.1072674824385</latitude>
<altitude>0</altitude>
<heading>4.947421249553717</heading>
<tilt>44.61324882043339</tilt>
<range>2927.61105910266</range>
</LookAt>
<styleUrl>#thickBlackLine</styleUrl>
<LineString>
<tessellate>1</tessellate>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates> -112.2532845153347,36.09886943729116,645
-112.2540466121145,36.09919570465255,645
-112.254734666947,36.09984998366178,645
-112.255493345654,36.10051310621746,645
-112.2563157098468,36.10108441943419,645
-112.2568033076439,36.10159722088088,645
-112.257494011321,36.10204323542867,645
-112.2584106072308,36.10229131995655,645
-112.2596588987972,36.10240001286358,645
-112.2610581199487,36.10213176873407,645
-112.2626285262793,36.10157011437219,645 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Relative Extruded</name>
<visibility>0</visibility>
<description>Opaque blue walls with red outline, height tracks terrain</description>
<LookAt>
<longitude>-112.2683594333433</longitude>
<latitude>36.09884362144909</latitude>
<altitude>0</altitude>
<heading>-72.24271551768405</heading>
<tilt>44.60855445139561</tilt>
<range>2184.193522571467</range>
</LookAt>
<styleUrl>#redLineBluePoly</styleUrl>
<LineString>
<extrude>1</extrude>
<tessellate>1</tessellate>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates> -112.2656634181359,36.09445214722695,630
-112.2652238941097,36.09520916122063,630
-112.2645079986395,36.09580763864907,630
-112.2638827428817,36.09628572284063,630
-112.2635746835406,36.09679275951239,630
-112.2635711822407,36.09740038871899,630
-112.2640296531825,36.09804913435539,630
-112.264327720538,36.09880337400301,630
-112.2642436562271,36.09963644790288,630
-112.2639148687042,36.10055381117246,630
-112.2626894973474,36.10149062823369,630 </coordinates>
</LineString>
</Placemark>
</Folder>
<Folder>
<name>Polygons</name>
<visibility>0</visibility>
<description>Examples of polygon shapes</description>
<Folder>
<name>Google Campus</name>
<visibility>0</visibility>
<description>A collection showing how easy it is to create 3-dimensional
buildings</description>
<LookAt>
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<name>Building 42</name>
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<name>Building 43</name>
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<Folder>
<name>Extruded Polygon</name>
<description>A simple way to model a building</description>
<Placemark>
<name>The Pentagon</name>
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The following is the resulting CSV after running the above code snippet (new CSV file: 'my_file.csv'):
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36.14988705767721,-112.3349463145932,36.14941108398372,-112.3354019540677,36.14878490381308,-112.3344428289146,36.14780840132443,-112.3331289492913,36.14680755678357,-112.3317019516947,36.1474173426228,-112.331131440106,36.14845453364654,-112.332616324338,36.14926570522069,-112.3339876620524,36.14988705767721,-112.3349463145932 36.1514008468736,-112.3348783983763,36.14888517553886,-112.3372535345629,36.14781612679284,-112.3356068927954,36.14846469024177,-112.3350034807972,36.1489624162954,-112.3358353861232,36.15026229372507,-112.3345888301373,36.14978096026463,-112.3337937856278,36.1504472788618,-112.3331798208424,36.1514008468736,-112.3348783983763
How to Convert KMZ to CSV in Python?
Files in the KML format are often packaged and distributed as KMZ files with the suffix .kmz.
ℹ️ KMZ files are zipped KML files with a special format for the content: a single root KML document named doc.kml. It has all additional files such as images and icons and 3D models located in the zip folder as well.
To convert a KMZ file to a CSV, you can unzip it and convert the root KML file to a .csv file in Python by using the BeautifulSoup and the csv libraries. You use the former to read the XML-structured KML file and the latter to write the CSV file row by row.
The remaining (non-CSV) contents of the zip folder, such as images, can hardly be converted to a CSV anyways.
See the code above for the KML to CSV conversion.