avl_render
To get a tile which contains information about all the enabled graphic layers, use the following request:
http://<host>/avl_render/<x>_<y>_<z>/<sid>.png
You can find an example of this request in the sample messages.
Parameters
Name | Description |
|---|---|
x | X-coordinate of the tile. |
y | Y-coordinate of the tile. |
z | Zoom. |
sid | Session ID. |
"adfurl":<uint> /* a specific variable used to avoid browser caching by changing the <uint> value in the session. */
The tile coordinates are calculated according to the concept described here. Zoom tiles for Webgis are from 17 to z.
Tile size
The default tile size is 256*256. In order to change the tile size, you may use the render/set_locale request with the density parameter.
Error codes
| Error code | Description |
|---|---|
| 304 | Not modified. |
| 503 | Service unavailable. |
Response
Returns a PNG image.