[GIS] Exporting layer from Google My Maps as KML has no geometries

google mapskml

I have a CSV with an address field (no lat/long), so I went to Google My Maps, imported the csv and geocoded of the records.

Now I export the layer as KML and added the KML to QGIS and Google Earth Pro, but in non of them I can see the markers. In fact in QGIS, the KML layer is added as datatable (no geometry).

What's happening? How can I export a geometry layer from google My Maps?

Best Answer

MyMaps will geocode addresses and display their locations within MyMaps, but unfortunately it will not export the geocoded coordinates to KML/KMZ. There are probably a number of reasons for this, including to prevent abuse of the MyMaps geocoding capability by folks who want to bulk geocode massive numbers addresses, and therefore really should be using a Geocoding API. There are other services out there that will geocode small numbers of addresses like this, so probably best to find one of those.

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[GIS] Why does one part of GML -> KML conversion not work on Google Maps

@andy, I was going to suggest basically the same thing @nhopton suggested. The size of the KML file may be causing an issue. Simplifying geometries may help the problem. I would suggest being careful though, as this can lower the resolution of your data. I do not think that will necessarily be an issue for your particular data set though. If you do have those concerns you can also try splinting up you data into several smaller files and make a few KML files instead of one giant one.

[GIS] Google Maps/Google Earth – KML Overlays and Custom Orientation

Please check the Limitations of KML/KMZ on Google Maps API:

Google Maps supports the following KML elements (that is, KML queries in the Search box and GGeoXml objects in the Maps API):

Placemarks
Icons
Folders
Descriptive HTML
    Entity replacement via <BalloonStyle> and <text> 
KMZ (compressed KML, including attached images)
Polylines and polygons
Styles for polylines and polygons, including color, fill, and opacity
Network links to import data dynamically
Ground overlays and screen overlays

This list does not apply to Google Earth's export to Google Maps, My Maps import, or My Maps export to Google Earth.

The KML parser generally silently ignores XML tags it does not understand.

Google Maps currently has specific limitations to the size and complexity of loaded KML files. Below is a summary of the current limits:

Note: these limits are temporary and are subject to change at any time. Maximum fetched file size (raw KML, raw GeoRSS, or compressed KMZ) 3MB Maximum uncompressed KML file size 10MB Maximum number of Network Links 10 Maximum number of total document-wide features 1,000

Best Answer

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