Update README.md

Author: Cas Perl

mapping/README.md

@@ -1,36 +1,3 @@
 # Mapping
 
-### Make a map with umap
-
-A map http://u.osmfr.org/m/53474/ is created to collect hiking and climbing destination around Munich.
-Their closest train or bus stations are also marked in the map.
-
-### Create a map to represent alpine huts
-
-- [Query alpine_hut from OSM](http://overpass-turbo.eu/s/pLp)
-
-### Create a heatmap to represent travel duration by public transportation
-
-At the moment umap does not really support a full functional heatmap feature,
-therefore here only a map with colored markers is created for the same purpose.
-
-- Install https://github.com/kennell/schiene to use API accessing http://bahn.de
-- Export only 'Transport' layer from http://umap.openstreetmap.fr/en/map/mtn_53474 (i.e. Transport.geojson)
-  - Transport layer contains train or bus stations and their names should be consistent with http://bahn.de
-  - run Transport/check-destination-name.py to check if all station names in Transport.geojson are corrected
-- run Transport/generate-umap-heatmap-from-train-stations.py to generate Transport.heatmap.geojson
-  - by default the travel duration is calculated from Munich main station
-  - Eventually the generated Transport.heatmap.geojson needs to be edited manually in case of something wrong.
-  - Transport.heatmap.geojson contains the same feature points from Transport.geojson with color code to represent travel duration
-- Import Transport.heatmap.geojson to umap
-
-Example:
-
-![Example](Transport/transportation.heatmap.png)
-
-Color code:
-- green-ish: < 1h
-- yelloe/brown-ish: < 2h
-- purple/pink-ish: < 3h
-- grey: > 3h
-- black: info not available at this time point
+https://observablehq.com/@easz/my-map