The shapefile in question does not define an axis order:
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]
As a result, GeoTools picks the order of international standards, which is
lat/lon. However, shapefiles are normally encoded lon/lat...
Add this at the beginning of the file to force a "east/north" order:
System.setProperty("org.geotools.referencing.forceXY", "true");
The shapefile reader internal code should probably be forcing this order by
default... although
care should be taken for those prj that do define an axis order. Needs some
research, not a 5 minutes change.
Cheers
Andrea
On Tue, Jun 6, 2017 at 7:53 PM, Ahmed Eldawy <[email protected]>
wrote:
> Hi all,
>
> I am new to GeoTools. I was trying to load a file that represents all US
> states downloaded from here.
> http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/
> 110m/cultural/ne_110m_admin_1_states_provinces.zip
> and the following GeoTIFF file
> http://commondatastorage.googleapis.com/earthenginepartners-hansen/
> GFC2013/Hansen_GFC2013_treecover2000_00N_000E.tif
>
> I also use the ImageLab example from GeoTools website to load the two
> files.
> http://docs.geotools.org/stable/tutorials/_downloads/ImageLab.java
>
> I use getools 17.0
>
> What happens is that the shapefile is rotated 90 degrees. The same files
> are loaded correctly in QGIS. It happens with other files as well that are
> also loaded correctly in QGIS.
>
> When I investigate the problem closely, I found that both files are loaded
> correctly. However, when the Shapefile is projected to the
> CoordinateReferenceSystem of the GeoTIFF file, the latitudes and longitudes
> are exchanged. This results in incorrect results when they are combined.
> Can you provide any help in why this problem happens and how I can solve it?
>
> Best regards,
> Ahmed Eldawy
>
>
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