Gets the spatial reference of existing arrays.
AFL% eo_getsrs([...]);| Argument | Description |
|---|---|
... |
Optional list of arrays |
A one-dimensional table-like array with rows for all given arrays and attributes (name, xdim, ydim, auth_name, auth_srid, srtext, proj4text). If no array is given as argument, the operator considers all spatially referenced arrays. Result attributes are described below.
| Attribute | Description |
|---|---|
name |
Array name |
xdim |
Name of the array dimension representing easting or longitude |
ydim |
Name of the array dimension representing northing or latitude |
auth_name |
Authority name of the spatial reference system |
auth_srid |
Unique identifier of the spatial reference system |
srtext |
WKT string of the reference system |
proj4text |
Proj4 string of the reference system |
A |
String definintion for an affine transformation that maps array coordinates to world coordinates |
The affine transformation A is used to relate image coordinates to referenced coordinates. Its string definition takes a space separated list of parameters x0,y0,a11,a12,a21,a22 with default values representing the identity transformation (0,0,1,0,0,1). Notice that the affine transformation is in line with the GDAL data model.
Create an array that covers the whole world with 1 degree pixel size and one day temporal resolution starting at January 1st, 2015.
store(build(<val:double>[lat=0:179,256,0,lon=0:359,256,0],double(random()) / double(2147483647)),world);
eo_setsrs(world,'lon','lat','EPSG',4326,'x0=-180 y0=90 a11=1 a22=-1');Get spatial reference information
eo_getsrs(world);Get partial reference information
project(eo_getsrs(world),arrayname, auth_name, auth_id) ;Clean up
remove(world);