Thanks for clarifying the terminology Frank. I have 6 Shapefiles all
located in the same directory with the accompanying sidecar files there as
well, is there anything else required to "operate on the as a group"?.
Can anyone explain how the CRS is detected when using the
ShapefileDataStore, or if I always need to manually set it?
On Mon, Feb 24, 2014 at 9:30 PM, Frank van der Hulst <
[email protected]> wrote:
> The term "Shapefile" does not refer just to the .SHP file, but also to all
> the other files with the same name (.dbf, .prj. etc). These files should
> always be operated on as a group.
>
>
>
> On Tue, Feb 25, 2014 at 2:32 PM, Thomas Evans <[email protected]>wrote:
>
>> Hi List,
>>
>> This is my first experience with GISData and GeoTools. I am trying to
>> use the ShapefileDataStore(URL url) to load up a handful of shape files
>> into my Geography. The schema and AttributeType of the GeometryTypeImpl
>> that are created during the ShapefileDataStore construction both contain a
>> null CRS. I believe this info is usually loaded from the .prj file that is
>> located in the same directory with the same filename of the .shp file.
>> Does anyone know of any gotchas here?
>>
>> Code -
>> URL url = data.getFile().toURI().toURL();
>> ShapefileDataStore store = new ShapefileDataStore(url);
>> SimpleFeatureType schema = store.getSchema(store.getTypeNames()[0]);
>> // First attribute at index 0 is always the Geometry
>> AttributeType type = schema.getType(0);
>> CoordinateReferenceSystem dataCRS = ((GeometryType)
>> type).getCoordinateReferenceSystem(); <-- Returns null
>>
>> schema.toString() -
>> SimpleFeatureTypeImpl
>> http://www.opengis.net/gml:SoCALbg2010_TRTP_Extent_DATA_NUMBERSidentified
>> extends
>> polygonFeature(the_geom:MultiPolygon,OBJECTID:OBJECTID,GEOID10:GEOID10,Shape_Leng:Shape_Leng,Shape_Area:Shape_Area,STATEP10_N:STATEP10_N,COUNTRYFP1:COUNTRYFP1,TRACTCE10_:TRACTCE10_,BLKGRPCE10:BLKGRPCE10,GEOID10_NO:GEOID10_NO,INTPLAT10_:INTPLAT10_,INTPLTON10:INTPLTON10,BLKGRP_NAM:BLKGRP_NAM,POP_TOTAL_:POP_TOTAL_,HHI_MEDIAN:HHI_MEDIAN,NOSCHOOL_N:NOSCHOOL_N,NOGED_NO:NOGED_NO,GED_NO:GED_NO,SOMEGOLLEG:SOMEGOLLEG,ASSOCIATE_:ASSOCIATE_,BACHELOR_N:BACHELOR_N,MASTER_NO:MASTER_NO,PROFESSION:PROFESSION,DOCTORATE_:DOCTORATE_,EDUCATION_:EDUCATION_,INCOME_NO:INCOME_NO,POWER_NO:POWER_NO,ALAND10_NO:ALAND10_NO,AWATER10_N:AWATER10_N,AREA_SQMI_:AREA_SQMI_,DENSITY_SQ:DENSITY_SQ)
>>
>> type.toString() -
>> GeometryTypeImpl MultiPolygon<MultiPolygon>
>>
>> prj file content -
>>
>> PROJCS["World_Robinson",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Robinson"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],UNIT["Meter",1.0]]
>>
>>
>> ------------------------------------------------------------------------------
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>>
>
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