rio pmtiles: Add "PMTiles metadata attribution" to the Python code (#570)

* rio pmtiles:  Add "PMTiles metadata attribution" to the Python code

* rio pmtiles:  Add "tileSize" to the Metadata

python/rio-pmtiles/README.rst

@@ -47,6 +47,7 @@ Usage
 
       --name TEXT                     PMTiles metadata name.
       --description TEXT              PMTiles metadata description.
+      --attribution TEXT              PMTiles metadata attribution.
       --overlay                       Export as an overlay (the default).
       --baselayer                     Export as a base layer.
       -f, --format [JPEG|PNG|WEBP]    Tile image format.  [default: WEBP]

python/rio-pmtiles/rio_pmtiles/scripts/cli.py

@@ -120,6 +120,7 @@ def guess_maxzoom(crs, bounds, width, height, tile_size):
 @output_opt
 @click.option("--name", help="PMTiles metadata name.")
 @click.option("--description", help="PMTiles metadata description.")
+@click.option("--attribution", help="PMTiles metadata attribution.")
 @click.option(
     "--overlay",
     "layer_type",
@@ -226,6 +227,7 @@ def pmtiles(
     output,
     name,
     description,
+    attribution,
     layer_type,
     img_format,
     tile_size,
@@ -300,6 +302,7 @@ def pmtiles(
             # Name and description.
             name = name or os.path.basename(src.name)
             description = description or src.name
+            attribution = attribution or None
 
             # Compute the geographic bounding box of the dataset.
             (west, east), (south, north) = transform(
@@ -374,7 +377,7 @@ def pmtiles(
         outfile.write(b"\x00" * 16384)
         entries = []
 
-        metadata = gzip.compress(json.dumps({'name':name,'type':layer_type,'description':description,'writer':f'rio-pmtiles {rio_pmtiles_version}'}).encode())
+        metadata = gzip.compress(json.dumps({'name':name,'type':layer_type,'description':description,'writer':f'rio-pmtiles {rio_pmtiles_version}','attribution':attribution,'tileSize':int(tile_size)}).encode())
         outfile.write(metadata)
 
         header = {}