OK, so it's a weird file. I'll leave it to you to decide whether it's worth making GDAL/Proj deal with it. I suspect not, and that's fine with us.
Thanks! Simon On Tue, Sep 24, 2019 at 12:22 PM Even Rouault <[email protected]> wrote: > On mardi 24 septembre 2019 11:52:22 CEST Simon Eves wrote: > > (re-posting as the first one ~2 weeks ago went into moderation quarantine > > due to attachment size and I don't know if it ever came out again, but > > certainly had no responses) > > > > When our system imports (using GDAL) the attached GeoJSON file (of > unknown > > provenance, via our QA team) the geo (California counties) ends up > > somewhere out in the Pacific and really small and slightly rotated. > > > > I get the same results whether I import the file directly, or do a > > Shapefile or WKT CSV conversion with ogr2ogr first (forcing to > EPSG:4326). > > > > Is the file bogus, or is GDAL not interpreting the original coordinate > > system correctly? > > Its CRS and coordinate encoding is highly unstandard > > > "crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:EPSG:102243"}},"hc- > transform":{"default":{"crs":"+proj=lcc +lat_1=37.06666666666667 > +lat_2=38.43333333333333 +lat_0=36.5 +lon > _0=-120.5 +x_0=2000000 +y_0=500000 +ellps=GRS80 +units=m +no_defs","scale": > 0.000665455608285,"jsonres":15.5,"jsonmarginX":-999,"jsonmarginY": > 9851.0,"xoffset":1668099.76286,"yoffset":1116967.85109}} > > EPSG:102243 doesn't exist. It is actually ESRI:102243 (the proj string > above > is consistant with that) > > But the main issue is the "transform" object that seems to describe a > offset & > scaling strategy to encode coordinates as integer values. You'll have to > manually apply those corrections > > -- > Spatialys - Geospatial professional services > http://www.spatialys.com > -- <http://www.omnisci.com/> Simon Eves Senior Graphics Engineer, Rendering Group OmniSci, 1 Front St. #2650, San Francisco, CA 94111, USA Email: [email protected] | Cell: 415.902.1996
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