[gdal-dev] Convert DBX/SHP to JSON using ogr2ogr

[Tobias Preuss]

Dear Even.
I would have never had the idea that the files need to be small
letters all to make the matching working. Thank you so much for this
advice!!! and the additional education on the formats.
Can you tell how I can determine the source SRS from the files? Is
that possible?
Tobias


On Sun, Jun 3, 2012 at 6:50 PM, Even Rouault
<even.rouault at mines-paris.org> wrote:
> Le dimanche 03 juin 2012 18:32:48, Tobias Preuss a écrit :
>> Hello. I am trying convert shape files [1] of London (Canada) into
>> JSON. I am totally new to these formats but at least I found out that
>> ogr2ogr is able to do the job. However, there are two files that
>> contain the data as far as I can tell. One file TREES.DBF contains all
>> the properties. The other file trees.shp holds the main objects (trees
>> in this case) with an identifier. I can convert each file into JSON
>> with the following commands.
>>
>> $ ogr2ogr -f GeoJSON -s_srs EPSG:26917 -t_srs EPSG:4326
>> trees_coordinates.json trees.shp
>> $ ogr2ogr -f GeoJSON -s_srs EPSG:26917 TREES_properties.json TREES.DBF
>>
>> I am not sure what the other files are good for?!
>
> A shapefile consists at the minimum of .shp, .shx and .dbf files.
>
> .shp contains the geometry, .shx is an index to the .shp, and .dbf contains
> the properties.
>
> The OGR Shapefile driver can read geometries and properties together, but in
> the particular case of this dataset, if you are on Unix/Linux, due to the case
> sensitivity of filesystems, you need to rename TREES.DBF to trees.dbf, so that
> .dbf and .shp are associated.
>
> I've tested that the following command then gives sensible result :
>  ogr2ogr -f GeoJSON -s_srs EPSG:26917 -t_srs EPSG:4326 trees.json trees.shp
>
> And to finish answering your question, the .sbn and .sbx are ESRI specific
> spatial index, and .shp.xml a ESRI specific metadata file. All 3 not used by
> OGR.