Added attributions for tile sources

holoviz · May 8, 2018 · 6fb2e52 · 6fb2e52
1 parent 5064448
commit 6fb2e52
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Showing 2 changed files with 36 additions and 2 deletions.
diff --git a/geoviews/plotting/bokeh/__init__.py b/geoviews/plotting/bokeh/__init__.py
@@ -21,6 +21,7 @@
                         HexTiles)
 from ...operation import (project_image, project_shape, project_points,
                           project_path, project_graph, project_quadmesh)
+from ...tile_sources import _ATTRIBUTIONS
 from ...util import geom_to_array
 from .plot import GeoPlot, OverlayPlot, DEFAULT_PROJ
 from . import callbacks # noqa
@@ -50,8 +51,14 @@ def get_data(self, element, ranges, style):
         elif all(kw in element.data for kw in ('{X}', '{Y}', '{Z}')):
             tile_source = WMTSTileSource
         else:
-            raise ValueError('Tile source URL format not recognized.')
-        return {}, {'tile_source': tile_source(url=element.data)}, style
+            raise ValueError('Tile source URL format not recognized. '
+                             'Must contain {X}/{Y}/{Z}, {XMIN}/{XMAX}/{YMIN}/{YMAX} '
+                             'or {Q} template strings.')
+        params = {'url': element.data}
+        for key, attribution in _ATTRIBUTIONS.items():
+            if all(k in element.data for k in key):
+                params['attribution'] = attribution
+        return {}, {'tile_source': tile_source(**params)}, style
 
     def _update_glyph(self, renderer, properties, mapping, glyph):
         allowed_properties = glyph.properties()

diff --git a/geoviews/tile_sources.py b/geoviews/tile_sources.py
@@ -1,5 +1,32 @@
 from .element import WMTS
 
+# Mapping between patterns to match specified as tuples and tuples containing attributions
+_ATTRIBUTIONS = {
+    ('openstreetmap',)      : (
+        '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
+    ),
+    ('cartodb') : (
+        '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors,'
+        '&copy; <a href="https://cartodb.com/attributions">CartoDB</a>'
+    ),
+    ('cartocdn') : (
+        '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors,'
+        '&copy; <a href="https://cartodb.com/attributions">CartoDB</a>'
+    ),
+    ('stamen', 'terrain'): (
+        'Map tiles by <a href="https://stamen.com">Stamen Design</a>, '
+        'under <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. '
+        'Data by <a href="https://openstreetmap.org">OpenStreetMap</a>, '
+        'under <a href="https://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.'
+    ),
+    ('stamen', 'toner'): (
+        'Map tiles by <a href="https://stamen.com">Stamen Design</a>, '
+        'under <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. '
+        'Data by <a href="https://openstreetmap.org">OpenStreetMap</a>, '
+        'under <a href="https://www.openstreetmap.org/copyright">ODbL</a>.'
+    )
+}
+
 # CartoDB basemaps
 CartoDark = WMTS('https://cartodb-basemaps-4.global.ssl.fastly.net/dark_all/{Z}/{X}/{Y}.png')
 CartoEco = WMTS('http://3.api.cartocdn.com/base-eco/{Z}/{X}/{Y}.png')