QA: Daten für Maproulette Challenge "Einfahrten"

project-quality-assurance/README.md

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+# About
+
+Evaluation of mapped service ways in OSM (in Berlin, Germany). To identify where OSM service-ways are missing, a comparison with open data from the Berlin Senate was carried out. 
+
+
+More information:
+- Wiki Seite https://wiki.openstreetmap.org/wiki/Berlin/Verkehrswende/Parkraum/Mapping_Kampagne_Xhain/QA-Einfahrten
+
+
+# Protocol
+
+## Geoportal Berlin Data
+
+1. Dataset “Straßenbefahrung 2014”, Layer “Gehwegüberfahrt” (Exits). Coordinates System EPSG:25833
+https://fbinter.stadt-berlin.de/fb/berlin/service_intern.jsp?id=s_Gehwegueberfahrt@senstadt&type=WFS
+
+
+2. Dataset “Berlin’s districts” 
+https://fbinter.stadt-berlin.de/fb/berlin/service_intern.jsp?id=s_wfs_alkis_bezirk@senstadt&type=WFS
+
+
+## OSM Data
+
+1. For the present purpose, Service-Ways are needed.  Get the OSM Data  direct from https://overpass-turbo.eu/ or with QGIS Plugin “QuickOSM”. Query for the last mencioned option:
+
+```
+[out:xml] [timeout:25];
+{{geocodeArea:Berlin}} -> .area_0;
+(
+way["highway"="service"](area.area_0);
+);
+(._;>;);
+out body;
+
+```
+
+## QGIS
+
+1. Connect WFS and export datasets as shapefiles. EPSG:25833 (‘exits’ and ‘districts’). Both have polygon geometries.
+
+1. Add OSM Data and export as shapefile EPSG:25833 (‘service_ways’, line layer)
+
+1. Apply Fix Geometries for the ‘exits’ layer.
+```
+   Algorithm 'Fix geometries' starting…
+      Input parameters:
+      { 'INPUT' : 'C:/Users/Public/Documents/Parkraum/exits.shp', 'OUTPUT' : 'TEMPORARY_OUTPUT' }
+
+      Execution completed in 7.91 seconds
+      Results:
+      {'OUTPUT': 'Fixed_geometries_0ca82017_caeb_4dce_be3e_9a7145604b08'}
+
+      Loading resulting layers
+   Algorithm 'Fix geometries' finished
+```
+1. Create spatial indexes for ‘exits’ (the one with fixed geometries) and ‘service-ways’ layers.
+
+1. Use Join Attributes by location to add the district name in ‘exits’ attribute table 
+   ```
+   Algorithm 'Join attributes by location' starting…
+      Input parameters:
+      { 'DISCARD_NONMATCHING' : False, 'INPUT' : 'memory://MultiPolygon?crs=EPSG:25833&field=elem_nr:string(254,0)&field=flaeche:double(23,15)&field=gis_id:string(254,0)&field=material:string(254,0)&field=bezirk:string(254,0)&field=osm_servic:string(10,0)&field=bezirk2:string(21,0)&uid={cef2c213-593e-4d5f-8c09-57572b7c9195}', 'JOIN' : 'C:/Users/Public/Documents/Parkraum/districts.shp', 'JOIN_FIELDS' : [], 'METHOD' : 1, 'OUTPUT' : 'TEMPORARY_OUTPUT', 'PREDICATE' : [5], 'PREFIX' : '' }
+
+      Execution completed in 6.46 seconds
+      Results:
+      {'JOINED_COUNT': 153511,
+      'OUTPUT': 'Joined_layer_6ea81f01_3e12_404c_b6cc_a1cad23389d3'}
+
+      Loading resulting layers
+   Algorithm 'Join attributes by location' finished
+
+1. Select by location: Select every polygon from ‘exits’ that touches or intersects a ‘service_ways’ line.
+```
+   Algorithm 'Select by location' starting…
+      Input parameters:
+      { 'INPUT' : 'C:/Users/Public/Documents/Parkraum/exits.shp', 'INTERSECT' : 'C:/Users/Public/Documents/Parkraum/service_ways.shp', 'METHOD' : 0, 'PREDICATE' : [0,4] }
+
+      Execution completed in 66.78 seconds (1 minute 7 seconds)
+      Results:
+      {'OUTPUT': 'exits_b_c3971341_d54c_4114_8dcd_8831b1c7d43d'}
+
+      Loading resulting layers
+   Algorithm 'Select by location' finished
+```
+1. Open the attribute table of ‘exits’ and with the field calculator add a new attribute (‘osm_service’) and insert the value 1.
+
+1. Reverse selection and for the new selected polygons add value 0 (in ‘osm_service’)
+
+1. Filter ‘exits‘ Layer, showing just the ‘osm_value’ 0 (all polygons not touching a osm-service line) and run "Centroids" on the last data layer.
+  ```
+   Algorithm 'Centroids' starting…
+      Input parameters:
+      { 'ALL_PARTS' : False, 'INPUT' : 'memory://memory?geometry=MultiPolygon&crs=EPSG:25833&field=elem_nr:string(254,0)&field=flaeche:double(23,15)&field=gis_id:string(254,0)&field=material:string(254,0)&field=bezirk:string(254,0)&field=osm_servic:string(10,0)&field=bezirk2:string(21,0)', 'OUTPUT' : 'TEMPORARY_OUTPUT' }
+
+      Execution completed in 1.74 seconds
+      Results:
+      {'OUTPUT': 'Centroids_108acec5_9332_48e9_a56c_98f77c1070fa'}
+
+      Loading resulting layers
+   Algorithm 'Centroids' finished
+```
+1. Export the result as a GeoJSON 'EPSG:4326'  (exits_without_serviceway)