[GRASS-user] setting initial region boundaries / info from spatialreference.org

GRASS GRASS user
1

Hello,
for my projects I often have to create several locations: 1 in wgs84 lat/lon for importing data, another for the actual target projection (e.g. ETRS89)).

One thing I always would like to have is the option to configure region extend and resolution setting by the projection default values in the location wizard.

The default values would be the maximum extended defined by the projection. With ETRS, for example, we would use:

Projected Bounds: 2426378.0132, 1528101.2618, 6293974.6215, 5446513.5222
see: http://spatialreference.org/ref/epsg/3035/

This small helper would be of a lot of benefit when creating new locations that shall receive reprojected features from another one.

What do you think?

Worth to add as feature request?

As a sidenote:
Could anyone please help me with the always useful info from spatialreference.org?

In which order are the corner coordiates for WGS84 Bounds & Projected Bounds listed?
I suppose W, E, S, N.
Could you confirm?
I may this hint be added to the portal or is is some kind of standard?

Thanks in advance for your answers,
Timmie

2

On 10/01/2012 23:31, Tim Michelsen wrote:

The default values would be the maximum extended defined by the
projection. With ETRS, for example, we would use:

Projected Bounds: 2426378.0132, 1528101.2618, 6293974.6215, 5446513.5222
see: http://spatialreference.org/ref/epsg/3035/

This is rather a side-remark than an answer to your actual questions.

a) the "maximum extent" of EPSG:3035 is not limited by the LAEA projection, but by the Datum of the CRS (ETRS89) which is defined to be "fixed to the stable part of the Eurasian continental plate.."

b) For checking EPSG codes, you might want to visit http://epsg-registry.org/ rather than http://spatialreference.org/

c) At epsg-registry.org, you will find this bounding box for ETRS89's "Area of Use":

Bounding Box Boundary Value (Decimal Degrees)
West Bound Longitude -16.10
East Bound Longitude 39.64
North Bound Latitude 84.16
South Bound Latitude 32.88

Hope this helps, Hermann