overlapping pixel height not identical

[qtang3]

Hello,

I am not sure if the program can generate overlapping tiles that meet the following criteria:

• The tiles are 65x65 vertices and overlap their neighbors at their edges. In other words, at the root, the eastern-most column of heights in the western tile is identical to the western-most column of heights in the eastern tile.

I did the following change to your code:

• set self.extrapixels = 1
• add some extra code to save tiles to tif (SetGeoTransform, SetProjection, etc) before destroying dstiles.
• specify a single tif file as input (datetype= Byte)

Then I open adjecent tiles in QGIS and found out the overlapping pixel'e height is not identical.

[giohappy]

Hi.
Are you sure overlapping pixels don't match? In one of the latest commits I fixed soem problems related to this. The only easy, robust, solution I found was setting self.extrapixels to 0, adding a post-processing phase (at the end of tile generation) which grabs and copies all the overlapping pixels between adjacent tiles. It solved all the corner cases I spot, in various geographical regions. Could you share a case where it still happen?