jywarren/cartagen

Can't pull map.js from cartagen.org

alyxb opened this issue · 3 comments

alyxb commented

Tried to select a sample of map data by using the rectangle selector,
but the link:

http://cartagen.org/api/0.6/map.json?bbox=-74.0202751,40.66994310380285,-73.9975151,40.68397343931536

seems to be 404'd. So, without installing a Cartagen server, how can I
obtain the JSON for that area?

jywarren commented

As of the forking of MapKnitter from Cartagen, I no longer operate a full planet server at http://cartagen.org. I'm really sorry but it was too much effort on my end; the planet is over 700gb and it takes a lot of CPU and bandwidth to do it.

This means your options are:

  • install your own planet server
  • convince the OSM devs to pull in some of my modifications to the OSM rails port (https://github.com/jywarren/openstreetmap-website), which probably means writing some tests for them
  • write a GeoJSON or GeoRSS parser (based on the NEWSFLOW code) so we can end-run around this limitation
  • hit the OSM API for XML data and convert it following these suggestions:
    • https://github.com/hay/xml2json - python based
    • someone could write a web-based XML->JSON parser and run it as a service so you can download OSM-XML and convert it online
movermeyer commented

I personally used: http://jsontoxml.utilities-online.info/
It worked fine, except the keys were prefixed with '-' characters.

A quick find/replace worked like a charm.

Wouter1 commented

I'll report here what I did, maybe useful for others trying to get this working

I got it pretty close to working but not completely

  • Download the project code from github (clone) and unzip.

  • Drop the index.html into safari. You will notice that it does not work. That is because of cross-origin restriction.

  • Go to safari develop menu and select "Disable cross-origin restrictions". Now the default map (of rome) should if you refresh the page.

  • Download a map from https://download.geofabrik.de/europe.html
    I took the Isle of Man map as it is small. Take the .osm.bz2 so that you can easily extract the plain .osm map

  • Go to http://www.utilities-online.info/xmltojson/#.Xtos0lDLcTs and copy the xml data in. Wait a few minutes. Copy the json data out and put it in a file

  • Edit the file in a text editor and replace all "- with " (remove all minuses after quotes). As movermeyer indicated, there seems no reason to have these minuses there

  • Copy the file into samples/data

  • Determine the map middle : open the json file or xml file. You will see at the top the map bounds minlat="53.73236" minlon="-5.434554" maxlat="54.6706" maxlon="-3.688718/>. Take some point inside this bounds. In this case, lat=54, lng=-4 would work

  • Edit index.html and put a ref to the json file in in the section "Carthagen.setup". You can comment out/disable the rome stuff. Also change the "lat" and "lng" position to somewhere in the middle of your map.

  • Reload the map

  • I got some vectors at this point, but I also get some error messages in the console and the map stays mostly empty.

The console error is:

cartagen.js : 624 : TypeError: undefined is not an object (evaluating 'this.coastline_nodes.first()[0]')