[mapserver-dev] WMS 1.3 GetFeatureInfo

Bart van den Eijnden bartvde at osgis.nl
Tue Mar 8 18:35:52 EST 2011

Hi devs,

how was WMS GetFeatureInfo implemented in Mapserver for WMS 1.3?

Does I and J follow the axis order like it says in the spec?	I, J
The mandatory I and J request parameters are integers that indicate a point of interest on the map that was produced by the embedded GetMap request (the “map request part” described in The point (I,J) is a point in the (i,j) space defined by the Map CS (see 6.7.2). Therefore:
⎯	the value of I shall be between 0 and the maximum value of the i axis; ⎯	the value of J shall be between 0 and the maximum value of the j axis; ⎯	the point I=0, J=0 indicates the pixel at the upper left corner of the map; ⎯	I increases to the right and J increases downward.
The point (I,J) represents the centre of the indicated pixel. If the value of I or of J is invalid, the server shall issue a service exception (code = InvalidPoint).

Best regards,

Looking for flexible support on OpenLayers or GeoExt? Please check out http://www.osgis.nl/support.html

Bart van den Eijnden
bartvde at osgis.nl

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