Making Maps from OpenStreetMap Data: Unterschied zwischen den Versionen

Version vom 19. März 2014, 13:59 Uhr

See also OSM, OSM-Daten zu Karten aufbereiten(german)

 >> Work in progress... (by Hao) <<

Overview

This is a "How To"/selfmade/Knowhow page about making nice web maps from OpenStreetMap data.

Workflow (experimental)

The plan is to put everything in a single script file (tbd.).

Step 0. Prepare software and config data

• Install software: OGR, SpatiaLite, TileMill
• Get config data, e.g. modified osmconf.ini
• Prepare clip boundary, e.g. liechtenstein_schloss_bbox.geojson

Step 1. Download, convert and clip OSM data (PBF file in, SQLite/SpatiaLite file out):

 > ogr2ogr -f "SQLite" liechtenstein3.sqlite
   /vsicurl/http://download.geofabrik.de/europe/liechtenstein-latest.osm.pbf 
   -dsco SPATIALITE=YES -skipfailures -progress -overwrite 
   --config OSM_CONFIG_FILE osmconf.ini -gt 65536 
   -clipsrc liechtenstein_schloss_bbox.geojson -clipsrclayer OGRGeoJSON 
   -nlt PROMOTE_TO_MULTI

Step 2a. Enhance SQLite dataset by shuffling geo objects around (using Spatialite, SQLite file in/out)

• Convert Polygons to Points and add them to points as POIs.
• Eventually convert multilinestring to linestring (can TileMill/Mapnik and QGIS handle multilinestrings/multipolygons?).

Step 2b. Do some other preprocessing using preprocessing tools (Python, SQLite file in/out)

• line smoothing of streets
• tbd.

Step 3. Style data using TileMill

• See CartoCSS and TileMill

Step 4. Publish map on the web

• See e.g. TileMill or Geovisualisierung

Notes

1. Test

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Team/Contact

• Prof. S. Keller
• Hao Feng Tan