danburzo / every-street Goto Github PK

osmosis --read-pbf data/romania-latest.osm.pbf --tf accept-ways highway=* --used-node --write-pbf data/data.osm.pbf

https://github.com/mapbox/tippecanoe

This data was gathered using the latest florida image from geofabrik.de (md5sum 89a6468db0a90ce7b5392695892287bf) inside of a Ubuntu VM that was allocated 2GB of ram with 2 cores (i5-4570, host has 12GB of ram and was not under load)

Using node inspector to inspect the Applying Nodes step shows:

I'm not sure what the deal is with the idle time, but ignoring that we can see that Leveldown is taking 60% of the time reading from the database(Database and LevelDOWN._get are seperate at 30% each). I'm going to run some experiments with using Redis as an alternative to leveldb. Yes it will be in ram, but I'm hoping that because it is in a database the amount used should be much more manageable (LevelDB only uses 300MB of diskspace in this case)

Using docker could let you test a redis server really quick and cleanly (as it doesn't touch the host).

Right now you need to do it manually.

As described in this post, I followed your steps and used this PBF file to generate visualizations of every street in Brazil:

Just as a heads up to someone trying the same, I tweaked the final output image by hand (removing the long lines) because some streets were glitched:

Maybe some incoherent data in the original PBF?

Nevertheless the result is really interesting and I can share the generated SVG too if you'd appreciate. Thank you.

The command nodejs tools/load-nodes.js returns this error:

/home/every-street-master/node_modules/level-writestream/index.js:5
  db.createWriteStream = createWriteStream;
                       ^
TypeError: Cannot set property 'createWriteStream' of undefined
    at attachConstructor (/home/every-street-master/node_modules/level-writestream/index.js:5:24)
    at /home/every-street-master/tools/load-nodes.js:15:2
    at dispatchError (/home/every-street-master/node_modules/level/node_modules/level-packager/node_modules/levelup/lib/util.js:64:35)
    at /home/every-street-master/node_modules/level/node_modules/level-packager/node_modules/levelup/lib/levelup.js:119:14
    at /home/every-street-master/node_modules/level/node_modules/leveldown/node_modules/abstract-leveldown/abstract-leveldown.js:39:16

If I console.log(db) right here I get undefined. So the whole levelup callback receives undefined for the database instance.

Any clues as to the cause of this?

Bounding box should be generated as part of extracting the nodes from the OSM data file.

How do you find the "natural" ratio when you use the Mercator projection? A mapWidth/mapHeight seems arbitrary.