osm_visualization

###North SLO County ###South SLO County

Download the OSM files

Download the daily improvement files in OSM from: http://planet.openstreetmap.org/replication/day/000/000/ and http://planet.openstreetmap.org/replication/day/000/001/

https://github.com/SLUGIS/osm_visualization/blob/master/data/retrieve-day000 https://github.com/SLUGIS/osm_visualization/blob/master/data/retrieve-day001

Run:

$ ./retrieve-day000 arg1 arg2 && $ ./retrieve-day001 arg3 arg4

Where:

• arg1 is: 11/01/2014 = 780 (start file)
• arg2 is: 06/08/2015 = 999 (end file)...for folder /000
  ...moving to folder /001...
• arg3 is: 06/08/2015 = 000 (start file)
• arg4 is: 11/05/2015 = 149 (end file)

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

Example:

~/osm_visualization/data$ ./retrieve-day 415 780

Convert data to Geojson file

we use: https://github.com/SLUGIS/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 bounding box from North San Luis Obispo County:

$minlat = 35.361056;
$minlon = -120.977325;
$maxlat = 35.778828;
$maxlon = -120.331879;

Example bounding box from South San Luis Obispo County:

$minlat = 34.992316;
$minlon = -120.901794;
$maxlat = 35.398566;
$maxlon = -120.355225;

Process a single file

Example:

~/osm_visualization/data$ ./get-edits 415.osc.gz 34.89752 -121.34792 35.79522 -119.47262 > slo415.geojson

It is possible to process all the files:

Run:

$ ./process_all start_file end_file minlat minlon maxlat maxlon

Example:

~/osm_visualization/data$ ./process_all 415 780 34.89752 -121.34792 35.79522 -119.47262

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

If you want to process the file for some especific user use the file, you have to edit the file: https://github.com/SLUGIS/osm_visualization/blob/master/data/get-edits-by-users, specifically the line https://github.com/SLUGIS/osm_visualization/blob/master/data/get-edits-by-users#L69 and add more users, then

Run:

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

Example:

~/osm_visualization/data$ ./get-edits-by-users 415.osc.gz 34.89752 -121.34792 35.79522 -119.47262 > slo415-users.geojson

Example processing for all users:

~/osm_visualization/data$ ./process_all_users 415 780 34.89752 -121.34792 35.79522 -119.47262

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 used a Mapbox Studio High Contrast image. We use Eric Fischer's project tile-stitch, clone to your machine and run.

Then we check the size of the image: in my case it's: "width":939, "height":748

Create a project in Tilemill:

Create a project in Tilemill called sluosm2014, we used a north & south: https://github.com/SLUGIS/osm_visualization/tree/master/tilemill-project/sluosm2014n (e.g., North). This project was stored in the ~/Documents/MapBox/project for this particular Ubuntu/Tilemill server install.

Configuration in Projectmill

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

project={
        "source": "sluosm2014n", #name of projet in Tilemill
        "destination": "sl"+ str(x),
        "format": "png",
        "minzoom": 1,
        "maxzoom": 16,
        "width":939, #width from tile-stitch image
        "height":748, #height from tile-stitch image
        "mml": {
                "Layer": [
                  {                                        
                              "Datasource": {
                              "file": "/home/ubuntu/osm_visualization/data/sl"+str(x)+".geojson"  #directory of files for process
                            }
              
                  }
                ],
                "advanced": {},
                "name": "line"+ str(x)
           
              }
    }

Run:

$ python make-config-n.py arg1 arg2

where: arg1: is the number of the first file that was downloaded before. arg2: is the number of the last file that was downloaded before.

Example:

~/osm_visualization$ python make-config-n.py 415 780

and then execute (~/tilemill is where this Tilemill is installed):

~/projectmill$ ./index.js --mill --render -c config.json -f -t ~/tilemill

After:

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

Created a GIF File

Copy and paste the tile-stitch image from tile-stitch to /MapBox/export and rename the file to one incremental digit less than the first file that was created by Tilemill:

The first file is called slo415.png, so the tile-stitch file was named to slo414.png. Then run:

Example:

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

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