notes on OpenMapKit (OMK), specifically mbtiles and osm files

#OpenMapKit (OMK) https://github.com/AmericanRedCross/OpenMapKit/wiki

install node
- install the following packages tl, mbtiles, tilelive-http
- npm install -g tl @mapbox/mbtiles tilelive-http
go to http://bboxfinder.com/ and box your area
- should return your cooridinates in the following order: lng-min, lat-min, lng-max, lat-max
open terminal/command line and cd to your project folder and run the following:
- tl copy -z 13 -Z 20 -b '{{lng-min}} {{lat-min}} {{lng-max}} {{lat-max}}' 'http://a.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png' mbtiles://./{{myFileName}}.mbtiles
- note that the HOT humanitarian tiles only render down to zoom 20
- it should begin saving the map tile images one by one and compiling them in the folder
- note: larger areas can take a number of hours
- it can be useful to run this on an Amazon EC2 instance
- helpful tools are screen for keeping the process running without keeping the terminal window open, and s3fs for moving the mbtiles files to S3 storage for easy access and sharing
change the coordinates order to lat-min, lng-min, lat-max, lng-max (2, 1, 4, 3) and add back the commas
go to http://overpass-turbo.eu/ and enter the following:
- way[building]({{lat-min}}, {{lng-min}}, {{lat-max}}, {{lng-max}});out meta;>;out meta qt;
- click Run and continue anyway if a warning pops up
- click Export and choose raw data directly from Overpass API and add a *.osm file extension when saving
copy both files to your phone
- in the root directory there should be openmapkit/mbtiles and openmapkit/osm
- copy the files into the respective folders

danbjoseph/omk-notes.md

danbjoseph commented Aug 26, 2019

danbjoseph commented Aug 27, 2019