hello guys , recently , I plan to transplant my flash map to openlayers , and my old map is based on UTM . I have read some examples and I create a file in the layer folder , inherits from the TileCache Object .
like this: OpenLayers.Layer.Terrafly = OpenLayers.Class(OpenLayers.Layer.TileCache, { .... }, because my map has its own source data , so I should rewrite the getURL() function of the layer, the problem is my source image is 400X400 , so ,what size should I asign to the tileSize , and how about the serverResolutions ? I have asign some number to the new layer based on my old map , but When I drag the map , some repeat tile or wrong order tile will be displayed , that means when calculate which tile will be displayed ,some error occurs . you can visit http://131.94.129.57:8080/OpenLayers-2.12/myDemos/terrafly.html and you can easily see the wrong order of the tiles my layer's source code : http://131.94.129.57:8080/OpenLayers-2.12/lib/OpenLayers/Layer/Terrafly.js I just do not know what is the tileSize and resolution should be given to the layer I create , that could make my map display correctly . <http://osgeo-org.1560.n6.nabble.com/file/n5035362/worng.jpg> Thanks for helping me . -- View this message in context: http://osgeo-org.1560.n6.nabble.com/a-calculate-problem-with-my-UTM-layer-tp5035362.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list us...@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/openlayers-users