Code

Changes between Version 4 and Version 5 of GeoDjangoExtras


Ignore:
Timestamp:
10/18/07 20:45:41 (7 years ago)
Author:
tlp
Comment:

Added extents usage for DataSource

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  • GeoDjangoExtras

    v4 v5  
    6666>>> max(layer.get_fields('AREA')) 
    6767>>> 6144504439.3812199 
    68  
     68>>> 
     69>>> # get the extent of your layer (what is the bounding box that this layer covers?) 
     70>>> layer.extent.wkt 
     71'POLYGON((2901388.75258 13655150.1056,2901388.75258 14013756.5554,3265973.14723 14013756.5554,3265973.14723 13655150.1056,2901388.75258 13655150.1056))' 
     72>>> # seeing this does not tell you much if you do not know what srs you are using 
     73>>>  print layer.srs 
     74PROJCS["NAD_1983_StatePlane_Texas_South_Central_FIPS_4204_Feet", 
     75    GEOGCS["GCS_North_American_1983", 
     76        DATUM["North_American_Datum_1983", 
     77            SPHEROID["GRS_1980",6378137.0,298.257222101]], 
     78        PRIMEM["Greenwich",0.0], 
     79        UNIT["Degree",0.0174532925199433]], 
     80    PROJECTION["Lambert_Conformal_Conic_2SP"], 
     81    PARAMETER["False_Easting",1968500.0], 
     82    PARAMETER["False_Northing",13123333.33333333], 
     83    PARAMETER["Central_Meridian",-99.0], 
     84    PARAMETER["Standard_Parallel_1",28.38333333333333], 
     85    PARAMETER["Standard_Parallel_2",30.28333333333334], 
     86    PARAMETER["Latitude_Of_Origin",27.83333333333333], 
     87    UNIT["Foot_US",0.3048006096012192]] 
     88>>>  
    6989 
    7090}}}