README.md

osm_visualization

Download the OSM files

Download the daily improvement files in OSM from: http://planet.openstreetmap.org/replication/day/000/000/

https://github.com/Rub21/osm_osm_visualization/blob/master/data/retrieve-day

Run:

$ ./retrieve-day arg1 arg2

Where:

• arg1 is: 01/09/2014 = 484 (start file)
• arg2 is: 04/09/2014 = 574 (end file)

The Script is based in : https://github.com/ericfischer/ebola/blob/master/retrieve-hourly

Example:

ruben@rub21:~/osm_visualization/data$ ./retrieve-day 448 574

Convert data to Geojson file

we use: https://github.com/Rub21/osm_osm_visualization/blob/master/data/get-edits: modified from: https://github.com/ericfischer/ebola/blob/master/get-mamou-edits

Run:

$ ./get-edits file minlat minlon maxlat maxlon > newfile.geojson

Example: Bounds from San Francisco:

$minlat = 37.716045;
$minlon = -122.51781;
$maxlat = 37.817006;
$maxlon = -122.34924;

Process a file

Example: 

ruben@rub21:~/osm_visualization/data$ ./get-edits 485.osc.gz 37.716045 -122.51781 37.817006 -122.34924 > sf485.geojson

Is possible to execute all the files:

Run:

$ ./process_all start_file end_file minlat minlon maxlat maxlon

Example:

ruben@rub21:~/osm_visualization/data$ ./process_all 484 574 37.716045 -122.51781 37.817006 -122.34924 

It will take a while depending on the number of files are.

If you want to process the file for some especific user use the file, you have to edit the file: https://github.com/Rub21/osm_visualization/blob/master/data/get-edits-by-users, exactly the line https://github.com/Rub21/osm_visualization/blob/master/data/get-edits-by-users#L64 and add more users, then

Run

$ ./get-edits file minlat minlon maxlat maxlon > newfile.geojson

Example:

ruben@rub21:~/osm_visualization/data$ ./get-edits-by-users 499.osc.gz 37.716045 -122.51781 37.817006 -122.34924 > sf499-users.geojson

Creating png files

You need to install Tilemill, and clone Projectmill

  git clone https://github.com/mapbox/projectmill.git

Get a background PNG File:

In this case we need satelital imagen :

we use ericfischer' project tile-stitch, cloning in your machine an run:

ruben@rub21:~/tile-stitch$ ./stitch -o sf.png -- 37.6787  -122.5171 37.8270 -122.3338 13 http://a.tiles.mapbox.com/v3/openstreetmap.map-4wvf9l0l/{z}/{x}/{y}.png

then we check the size of imagen: in my cas is : "width":1068, "height":1093

Create a project in Tilemill:

I create a project in Tilemill called sfbuildings: https://github.com/Rub21/osm_visualization/tree/master/tilemill-project/sfbuildings

Configuration in Projectmill

We need to configure this file https://github.com/Rub21/osm_visualization/blob/master/make-config.py, the exact lines are:

project={
        "source": "sfbuildings", #name of projet in Tilemill
        "destination": "sf"+ str(x),
        "format": "png",
        "minzoom": 1,
        "maxzoom": 16,
        "width":1068, #it is a width form satelital imagen
        "height":1093, #it is a height form satelital imagen
        "mml": {
                "Layer": [
                  {                                        
                              "Datasource": {
                              "file": "/home/ruben/osm_visualization/data/sf"+str(x)+".geojson"  #directory of files for process
                            }
              
                  }
                ],
                "advanced": {},
                "name": "line"+ str(x)
           
              }
    }

Run:

$ python config.py arg1 arg2

where: arg1: is the number of the first file that we dowload before. arg2: is the number of the last file that we dowload before.

Example:

ruben@rub21:~/visualization/projectmill$ python config.py 484 574

and then execute:

ruben@rub21:~/Apps/visualization/projectmill$ ./index.js --mill  --render  -c config.json -f -t /usr/share/tilemill

After:

That files are created in: /home/ruben/Documents/MapBox/export.

Created a GIF File

Copy and paste the satelital imagen from folder tile-stitch to /MapBox/export and renamed the file a smaller number of the first file that was created by Tilemill:

my first file is called: sf484.png, I renamed the imagen file to sf483.png and then run:

Example:

ruben@rub21:~/Documents/MapBox/export$ mogrify -format gif *.png && gifsicle *.gif > anim.gif
ruben@rub21:~/Documents/MapBox/export$ gifsicle --loop=0 --colors 256 *.gif > anim.gif

The result is:

Source for mae a gif: http://www.lcdf.org/gifsicle/man.html