[Qgis-user] KML import into QGIS problems and confusion

[Brad Nesom]

On Fri, Feb 10, 2012 at 10:41 AM, spiderplant0 <spiderplant0 at gmail.com>wrote:

> I am having problems importing KML vectors into QGIS.
> To try and figure out whats going wrong I carried out an experiment...
>
> In QGIS, created a simple vector shapefile containing one polygon (set to
> EPSG900913).
> Used QGIS to save it as an KML.
> Tested this KML out in Google Earth - the polygon was in the correct place
> -
> so far so good.
> Imported the KML back into QGIS ( Menu > Layer > Add Vector layer). This
> doesnt work. The polygon is distorted, in completely the wrong place and
> very small (maybe its regarding the degrees latitude and longitude as
> metres?)
>
> I notice there is no mention of the map projection in the KML. How does it
> know what to use?

Google Earth probably doesn't recognize your coordinate system.  You
must convert them to the WGS_1984 geographic coordinate system.

http://groups.google.com/group/kml-support-getting-started/browse_thread/thread/bf071e01f19ed144/d493f875c726fde4?pli=1

http://www.georeference.org/doc/export_drawing_kml_kmz.htm


> Under the layer properties in QGIS it seems to be set to
> 'EPSG:4326 - WGS 84'. This is not what I want (EPSG900913). But I believe
> these EPSGs are similar and so doesnt account for the massive change in
> position, size, etc. Changing the CRS in layer properties didnt help.
>
> The only way I could figure out to get it to display properly was to 'save
> as shapefile' and set to  EPSG900913. Then reload this shape file into
> QGIS.
>
> Is there a simpler way. Ie get QGIS to display the KML directly?
>
> Here is a link to the shapefile (test3_epsg900913) and the KML
> (test3b.kml)...
>
> https://docs.google.com/open?id=0B93lksnTC7_cMGMzMTNiMTEtNThiNi00ZjQ5LWIzZTMtNzg2MjZhMmM3ZTIy
>
> https://docs.google.com/open?id=0B93lksnTC7_cMGMzMTNiMTEtNThiNi00ZjQ5LWIzZTMtNzg2MjZhMmM3ZTIy
> The polygon should appear on top of an island of the coast of Scotland.
> I'm using QGIS 1.7.3.
>
> Thank.
>
>
> --
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> http://osgeo-org.1560.n6.nabble.com/KML-import-into-QGIS-problems-and-confusion-tp4383869p4383869.html
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