Fix mapshader config example (#95)

* fix mapshader YAML config example on the readme file

* fix xarray error when constructing a variable without using the .data property

Author: giancastro

README.md

@@ -57,17 +57,23 @@ metadata:
   version: 1
 
 sources:
-  - name: Elevation
-    key: elevation-user
+  - name: Global Elevation Example
+    key: elevation-example
     text: Elevation
-    description: Global elevation
+    description: Global elevation example
     geometry_type: raster
     shade_how: linear
-    span: min/max
+    cmap:
+      - white
+      - black
+    span:
+      - 58
+      - 248
+    raster_padding: 0
     raster_interpolate: linear
     xfield: geometry
     yfield: geometry
-    filepath: ~/mapshader/mapshader/tests/fixtures/elevation.tif
+    filepath: mapshader/tests/fixtures/elevation.tif
     transforms:
       - name: squeeze
         args:
@@ -82,6 +88,8 @@ sources:
       - name: reproject_raster
         args:
           epsg: 3857
+    service_types:
+      - tile
 ```
 
 This configuration file can then be passed to the flask server upon startup:

mapshader/commands/tif_to_netcdf.py

@@ -134,7 +134,7 @@ def tif_to_netcdf(
     arr = reproject_raster(arr, epsg=crs)
 
     dataset = xr.Dataset(
-        data_vars={data_variable: (['y', 'x'], arr.chunk(chunks))},
+        data_vars={data_variable: (['y', 'x'], arr.chunk(chunks).data)},
         coords={'x': arr.coords[x], 'y': arr.coords[y]},
     )
     dataset.attrs = dict(name=data_variable)