From 0f86491784eca133958adc9bf767524b64c010b4 Mon Sep 17 00:00:00 2001
From: Thorben Westerhuys <thorben@cividi.ch>
Date: Fri, 26 Feb 2021 16:43:27 +0100
Subject: [PATCH] Adds WMS layer support

---
 README.md             | 18 ++++++++++++++++--
 datapackage.json      | 13 +++++++++++++
 schemas/snapshot.json | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index a77b784..e540acc 100644
--- a/README.md
+++ b/README.md
@@ -39,9 +39,10 @@ a Snapshots (Spatial Data Package) also require (technical details see below)
 1. a `view` – Defining how the map can be rendered
 1. a `source` – Listing data sources
 1. `resource`s added to a `view` to be either
-   - a simple-style GeoJSON – for Lines, Polygons, Markers
-   - a simple-style-extended GeoJSON – for Circles
+   - a simple-style GeoJSON – supporting Lines, Polygons, Markers
+   - a simple-style-extended GeoJSON – supporting Circles
    - a mapbox style URL – for a background map
+   - a [WMS](https://www.ogc.org/standards/wms) layer
 
 ### Examples
 
@@ -56,6 +57,7 @@ Possible Mediatypes
 - `application/geo+json`: GeoJSON with [Mapbox Simple Styles](https://github.com/mapbox/simplestyle-spec)
 - `application/vnd.simplestyle-extended`: GeoJSON with [Extended Simple Styles](https://github.com/cividi/simplestyle-extended-spec)
 - `application/vnd.mapbox-vector-tile`: Mapbox URI for styled vector tiles
+- `application/vnd.wms`: WMS URI and parameters (see example below)
 
 ### Views
 
@@ -123,6 +125,18 @@ For a map view compatible with the [Gemeindescan-Project](https://bitbucket.org/
         }]
       }
     },
+    {
+      "name": "wms-bauzonen",
+      "title": "Geo Admin: Bauzonen Schweiz (harmonisiert)",
+      "mediatype": "application/vnd.wms",
+      "path": "https://wms.geo.admin.ch",
+      "parameters": {
+        "format": "image/png",
+        "transparent": true,
+        "layers": "ch.are.bauzonen",
+        "opacity": 0.5
+      }
+    },
     {
       "path": "mapbox://styles/gemeindescan/ckc4sha4310d21iszp8ri17u2",
       "mediatype": "application/vnd.mapbox-vector-tile",
diff --git a/datapackage.json b/datapackage.json
index f4b37b5..5052abb 100644
--- a/datapackage.json
+++ b/datapackage.json
@@ -1,4 +1,5 @@
 {
+    "$schema": "./schemas/snapshot.json",
     "name": "gemeindescan-snapshot-sample",
     "title": "Gemeindescan Snapshot Sample",
     "keywords": ["europe", "switzerland", "gemeindescan", "geodata"],
@@ -8871,6 +8872,18 @@
                 }]
             }
         },
+        {
+            "name": "wms-bauzonen",
+            "title": "Geo Admin: Bauzonen Schweiz (harmonisiert)",
+            "mediatype": "application/vnd.wms",
+            "path": "https://wms.geo.admin.ch",
+            "parameters": {
+                "format": "image/png",
+                "transparent": true,
+                "layers": "ch.are.bauzonen",
+                "opacity": 0.5
+            }
+        },
         {
             "path": "mapbox://styles/gemeindescan/ckc4sha4310d21iszp8ri17u2",
             "mediatype": "application/vnd.mapbox-vector-tile",
diff --git a/schemas/snapshot.json b/schemas/snapshot.json
index e503051..fd0e8d5 100644
--- a/schemas/snapshot.json
+++ b/schemas/snapshot.json
@@ -261,6 +261,41 @@
                             }
                         }
                     },
+                    {
+                        "required": ["name", "path", "mediatype","parameters"],
+                        "description": "A WMS data resource.",
+                        "properties": {
+                            "mediatype": {
+                                "pattern": "^application\/vnd\\.wms$"
+                            },
+                            "parameters": {
+                                "type": "object",
+                                "required": ["format","transparent","layers","opacity"],
+                                "description": "Parameters how to request the WMS layer via Leaflet.",
+                                "properties": {
+                                    "format": {
+                                        "type": "string",
+                                        "pattern": "image\/png",
+                                        "description": "The WMS tile type."
+                                    },
+                                    "transparent": {
+                                        "type": "boolean",
+                                        "description": "If the PNG tiles should support transparency."
+                                    },
+                                    "layers": {
+                                        "type": "string",
+                                        "description": "The WMS layer name."
+                                    },
+                                    "opacity": {
+                                        "description": "Opacity of the layer.",
+                                        "type": "number",
+                                        "minimum": 0,
+                                        "maximum": 1
+                                    }
+                                }
+                            }
+                        }
+                    },
                     {
                         "required": ["name", "path", "mediatype"],
                         "properties": {