>> Blog home Dealing with TLX and MaxX bounding boxes.
September 14, 2009
In Image Web Server documentation, for bounding boxes or coordinate references, we often refer to TLX, BRX, TLY, BRY. TLX stands for "Top Left X-coordinate". "BRX", refers to "Bottom Right X-coordinate.
Other applications may instead use different terms, such as MINX and MINY.
How do the two systems relate? Well, very easily, the mapping is found below:
MAXX = BRX
MAXY = TLY
MINX = TLX
MINY = BRY
So, you just need to substitute the values when dealing with different systems. For example, an OGC WMS Service will use the MINX terminology. Simply translating the IWS coordinates will allow you to easily communicate with WMS services.
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