[OSM-newbies] Project of the Week/Month, and results

[Gregory Williams]

> -----Original Message-----
> From: newbies-bounces at openstreetmap.org [mailto:newbies-
> bounces at openstreetmap.org] On Behalf Of Simone Cortesi
> Sent: 16 December 2010 11:49
> To: newbies at openstreetmap.org
> Subject: Re: [OSM-newbies] Project of the Week/Month, and results
> 
> On Thu, Dec 16, 2010 at 10:07, Gregory Williams
> <gregory.williams at purplegeodesoftware.co.uk> wrote:
> >
> > A great suggestion. I'm looking forward to seeing the results of this
> on a
> > cycle parking heat map that I maintain:
> >
> > http://www.spokeseastkent.org.uk/maps/cycle-parking-heat-map/
> >
> > Remember to include the capacity=# tag for the most noticeable
> effect.
> 
> Gregory,
> can you share with us some code behind your heat map system?
> 
> Thankyou!

There's now some source code (C#) available at:

http://www.spokeseastkent.org.uk/maps/cycle-parking-heat-map/OsmCycleHeatMap
Source.zip

It's still a tad messy and I'm also aware that it's not as efficient as it
could be.

You'll want to run the compiled code in one of a few ways:

Process all the data that's in the Postgres database:
heatmap --fullplanet

Import data using replication sets, starting at 123456:
heatmap --followreplication 123456

Import data using replication sets from where the code last got to (This
currently assumes that the state has been saved to the registry):
heatmap --followreplication

The code gets its data from a Postgres instance that's consuming replication
sets with osm2pgsql. You'll need to edit the connection string as
appropriate for your own osm2pgsql instance. The style file for osm2pgsql is
slightly modified such that it also gets capacity tag to support this. To
ensure that the heat map code doesn't try to get ahead of the current
osm2pgsql import it checks the state.txt file that the import process leaves
in the filesystem. You'll need to edit the path to the state.txt file in
order to match your environment too.

Currently the tiles are dumped into a directory on my local PC. I then FTP
these up to the website whenever I get round to it. I'll eventually add the
FTP code in to do that automatically instead.

Cheers,

Gregory