django-raster rendering raster url

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Xristos Xristoou

Jul 3, 2018, 3:42:42 PM7/3/18
to geodjango

i want to add raster functionality in django using postgis database using django-raster package and this docs.

here my code :

from django.contrib.gis.db import models
class RasterWithName(models.Model):
    raster = models.RasterField()
    name = models.TextField()

add raster using console :

from django.contrib.gis.gdal import GDALRaster
from myapp.models import RasterWithName
gdal_raster = GDALRaster('C:/Users/username/Desktop/image.tif')
rast = RasterWithName(name='one', raster=gdal_raster)

but i am very confused with Rendering tiles and urls.

docs say :

/raster/tiles/layer_id/{z}/{x}/{y}.png where the layer_id is the primary key of a raster layer. This structure can be used directly in online mapping software such as OpenLayers or Leaflet. An example request could look like this: /raster/tiles/23/8/536/143.png, returning a tile in png format of the layer with ID pk=23 at zoom level z=8 and indexes x=536 and y=143

but indexes x,y mean some random x,y coordinate in image ?anyway i using this url or x,y in my image) and i take a black window in my browser,any idea where i have wrong in my url rendering ?

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