Making Maps from OpenStreetMap Data

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

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

Overview

This is a how to/knowhow page about making nice web maps from OpenStreetMap data.

See also Map Making Overview at OSM Wiki.

Our plan (see Team below) is to put everything in a single script file (tbd.).

Use Case 'Vintage Map'

As a first use case we will show how to make a Vintage Map from OpenStreetMap data.

tbd.

Your Use Case Here?

'Note:' If you have a nice styling (preferrably in CartoCSS) based on any 'map oriented' OSM database, pls. contact us (see Team below)!

Workflow

Pls. note that this is still work in progress and thus experimental, suboptimal and at worst partially broken.

The workflow consists of followin steps:

  • Step 0. Prepare software and config data.
  • Step 1. Download, convert and clip OSM data. You can skip to Step 3 "Style data" if you are in a hurry.
  • Step 2. Enhance and preprocess SQLite dataset.
  • Step 3. Style data.
  • Step 4. Publish map.

As said before, our goal is to wrap step 1 and 2 into one single Python script.

Step 0. Prepare software and config data

  • Install software: OGR/Python, 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

  • Open command line shell (PBF file in, SQLite/SpatiaLite file out):
 > ogr2ogr -f "SQLite" liechtenstein.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

Alternatives (not used further here; this does not mean they are unusable - in contrary! - but that the are just not considered for different reasons):

  • spatialite_osm_map (OSM import tool from Spatialite) - no config of own tag->attribute mapping, no clipping possible?
  • osm2pgsql - requires PostGIS which is cumbersome being another local server software.
  • osmosis - no tag->attribute mapping?

Step 2a. Enhance SQLite dataset

  • Enhance 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

  • use preprocessing tools (Python, SQLite file in/out)
  • line smoothing of streets
  • tbd.

Step 3. Style data

  • Start TileMill
  • See CartoCSS and TileMill

Step 4. Publish map

Notes

  1. Test
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Team

Von «https://giswiki.hsr.ch/index.php?title=Making_Maps_from_OpenStreetMap_Data&oldid=49892»