Re: [Geotools-gt2-users] Issue loading SHP file with ShapefileDataStore

[Jody G. <jod...@gm...>]

Good you got it to work.

One thing I do to figure stuff out is look at the
http://spatialreference.org website. It lets you compare things (including
the PRJ definition).

Searching that website there is only one hit for "World_Robinson":

http://spatialreference.org/ref/esri/54030/

This means you could look up the GeoTools definition using
CRS.decode("EPSG:54030"). However it does not look to be an "official" EPSG
code so we may not have it :)


Jody Garnett


On Wed, Mar 5, 2014 at 1:51 PM, Thomas Evans <tho...@gm...>wrote:

> Thanks for the response Jody!  I was able to work past previously doing
> exactly as you suggested with one caveat.  It was unable to read/understand
> the False_Northing and False_Easting parameters so I had to remove these,
> but feel like that was a safe change since in both the CRS used in my
> project they are 0.0.  Any thoughts on this?
>
>
> On Tue, Mar 4, 2014 at 6:50 PM, Jody Garnett <jod...@gm...>wrote:
>
>> Looks like you have a PRJ file:
>>
>> 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]]
>>
>> If you would like to check if GeoTools can understand your PRJ file you
>> can uses CRS.parseWKT( String ) method.
>>
>>  There are examples here:
>> http://docs.geotools.org/stable/userguide/library/referencing/crs.html
>>
>> Jody Garnett
>>
>>
>> On Wed, Mar 5, 2014 at 10:47 AM, Jody Garnett <jod...@gm...>wrote:
>>
>>> CRS detection is provided by the "PRJ" sidecar file. If it is present
>>> then GeoTools can read the file and parse a CoordinateReferenceSystem
>>> object out.
>>>
>>> If it is not present you can either set it manually (GeoTools will write
>>> out the PRJ file), or in cases where the PRJ file is missing/wrong you can
>>> force a CRS as part of your Query.
>>>
>>> Jody Garnett
>>>
>>>
>>> On Wed, Feb 26, 2014 at 8:35 AM, Thomas Evans <tho...@gm...>wrote:
>>>
>>>> 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 <
>>>> dri...@gm...> 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 <
>>>>> tho...@gm...> 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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>>
>