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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I noticed this question <a href="https://gis.stackexchange.com/questions/316776/ogr2ogr-fails-with-no-such-table">
https://gis.stackexchange.com/questions/316776/ogr2ogr-fails-with-no-such-table</a> and tried to study that odd shapefile by repeating the test with GDAL 2.4.0 from OSGeo4W and there happens something with ST_AsGeoJSON that I do not understand.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This command indeed returns an empty result<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ogrinfo -dialect sqlite -sql "select AsGeoJSON(geom) from \"geo_export_98941210-c995-4502-8ebb-93a09f29d615\" limit 1" fix.gpkg<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">INFO: Open of `fix.gpkg'<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> using driver `GPKG' successful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Layer name: SELECT<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Geometry: None<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Feature Count: 1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Layer SRS WKT:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(unknown)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">AsGeoJSON(geom): String (0.0)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">OGRFeature(SELECT):0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> AsGeoJSON(geom) (String) = (null)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Other Spatialite functions (AsGML, AsKML, AsBinary, AsSVG) do return the geometry, it is only AsGeoJSON that gives an empty result.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">However, with a trick I could get also GeoJSON out:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ogrinfo -dialect sqlite -sql "select AsGeoJSON(st_geomfromtext(st_astext(geom))) from \"geo_export_98941210-c995-4502-8ebb-93a09f29d615\" limit 1" fix.gpkg<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">INFO: Open of `fix.gpkg'<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> using driver `GPKG' successful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Layer name: SELECT<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Geometry: None<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Feature Count: 1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Layer SRS WKT:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(unknown)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">AsGeoJSON(st_geomfromtext(st_astext(geom))): String (0.0)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">OGRFeature(SELECT):0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> AsGeoJSON(st_geomfromtext(st_astext(geom))) (String) = {"type":"Polygon","coordinates":[[[-87.666731,41.707976],[-87.66686799999998,41.70797699999999],[-87.66686699999999,41.708063],[-87.666684,41.708064],[-87.666683,41.70799499999999],[-87.66673,41.70799499999999],[-87.666731,41.707976]]]}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I could only repeat the result by reading the data directly from geopackage, not by saving the feature taken from gpkg into shapefile or OpenJUMP JML format. I produced a minimal geopackage
<a href="http://latuviitta.org/downloads/one_chicago.gpkg">http://latuviitta.org/downloads/one_chicago.gpkg</a> with only one feature for testing. The command to try is<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ogrinfo -dialect sqlite -sql "select AsGeoJSON(geom) from \"geo_export_98941210-c995-4502-8ebb-93a09f29d615\"" one_chicago.gpkg<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
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