ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Attempting to clarify.

Browse Source
This commit is contained in:
Tim Schaub
2012-07-05 21:45:16 -06:00
committed by Tom Payne
parent 94d85d4821
commit c56fce2be8
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
doc/ol3.md
+9
View File
@@ -201,6 +201,15 @@ Renderer
Questions: Questions:
- Store tile layer extent in TileLayer or in TileGrid? (not clear) - Store tile layer extent in TileLayer or in TileGrid? (not clear)
Two concepts: tile coordinate system range and and available data extent.
TileGrid extent is range (or validity extent) of the tile coordinate system.
TileLayer extent is the available data extent. A particular TileGrid may range
from 0,0 to 10,10. My cache may conform to that grid but I may only have tiles
ranging from 2,2 to 8,8. When you need to wrap multiple worlds, you pay
attention to the TileGrid extent. When you need to decide whether or not to
bother requesting a tile, you pay attention to the TileLayer extent.
- Who determines "best" resolution? (static function?) - Who determines "best" resolution? (static function?)