[gdal-dev] geojson to shp and vice versa

[Richard Greenwood]

I don't know anything about iterating thru a .zip file, but just in case
you aren't already familiar with it, ogr2ogr has -sql and -where options
that can be used to filter geometry types. So if you have different
geometry type in a single source file you can use for example:
   -where "OGR_GEOMETRY='MULTIPOLYGON' OR OGR_GEOMETRY='POLYGON'"
If you have geometry collections with multiple geometry types it gets
harder. Personally, I'd pump it thru PostGIS in that case.

Rich

On Fri, Nov 29, 2019 at 1:42 AM Kristijan Cindrić <kcindric at gmail.com>
wrote:

> Thanks for the prompt answers! Ok, it's clear now on what's the problem
> here.
> Is there a way I can iterate through a .zip file containing individual
> .shp files, each file with its own geometry type (point, line, polygon),
> using ogre.adc4gis.com API? I could then append each feature to a geojson
> feature class and show it to the user. If ogre.adc4gis.com doesn't work I
> can try to run ogr2ogr in my app so suggestions in that way are helpful
> also.
>
> Thanks,
>
> Chris
>
> pet, 29. stu 2019. u 09:28 jratike80 <jukka.rahkonen at maanmittauslaitos.fi>
> napisao je:
>
>> Hi,
>>
>> You just can't save lines and polygons into same shapefile. Read
>> https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf "All the
>> non-Null shapes in a shapefile are required to be of the same shape type."
>>
>>
>> -Jukka Rahkonen-
>>
>>
>> Kristijan Cindrić wrote
>> > Dear all,
>> >
>> > I have a headache inducing problem. Whenever I try to convert a GeoJSON
>> > feature collection which contains multiple different geometry shapes
>> (i.e.
>> > polygon, linestring and point) I get this type of error:
>> >
>> > "ERROR 1: Attempt to write non-polygon (LINESTRING) geometry to POLYGON
>> > type shapefile.\nERROR 1: Unable to write feature 1 from layer
>> > OGRGeoJSON.\nERROR 1: Terminating translation prematurely after
>> > failed\ntranslation of layer OGRGeoJSON (use -skipfailures to skip
>> > errors)\n"
>> >
>> > This is the sample GeoJSON I'm trying to convert:
>> >
>> > {
>> >     "type": "FeatureCollection",
>> >     "features": [{
>> >         "type": "Feature",
>> >         "properties": {},
>> >         "geometry": {
>> >             "type": "Polygon",
>> >             "coordinates": [
>> >                 [
>> >                     [31.816406250000004, 55.27911529201564],
>> >                     [34.27734375000001, 51.944264879028765],
>> >                     [43.94531250000001, 51.944264879028765],
>> >                     [46.93359375000001, 58.35563036280967],
>> >                     [40.42968750000001, 60.1524422143808],
>> >                     [34.45312500000001, 59.085738569819505],
>> >                     [31.816406250000004, 55.27911529201564]
>> >                 ]
>> >             ]
>> >         }
>> >     }, {
>> >         "type": "Feature",
>> >         "properties": {},
>> >         "geometry": {
>> >             "type": "LineString",
>> >             "coordinates": [
>> >                 [0.5273437500000001, 21.289374355860424],
>> >                 [30.585937500000004, 20.632784250388028]
>> >             ]
>> >         }
>> >     }, {
>> >         "type": "Feature",
>> >         "properties": {},
>> >         "geometry": {
>> >             "type": "Point",
>> >             "coordinates": [14.062500000000002, 50.064191736659104]
>> >         }
>> >     }]
>> > }
>> >
>> >
>> > I validated the GeoJSON on geojsonlint <http://geojsonlint.com/>
>> and
>> > it's
>> > all good. It happens every time I have a stack of different geometry
>> > types.
>> > It happens using ogre.adc4gis.com or ogr2ogr. It happens in the
>> opposite
>> > way also and when I use the skipfailure option I just get the first
>> > feature
>> > in my shapefile.
>> >
>> > Any ideas what's going on?
>> >
>> >
>> > Thanks!
>> >
>> >
>> > Chris
>> >
>> > _______________________________________________
>> > gdal-dev mailing list
>>
>> > gdal-dev at .osgeo
>>
>> > https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>>
>>
>>
>>
>> --
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-- 
Richard W. Greenwood, PLS
www.greenwoodmap.com
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