-----Original Message-----
From: Iván Sánchez Ortega [mailto:[email protected]]
Sent: Thursday, 21 February 2013 12:46 AM
To: [email protected]
Subject: Re: [OSM-newbies] What do I need?

On Miércoles, 20 de febrero de 2013 06:33:02 Luke Mason escribió:
[snip]

I guess you could extract the bounding boxes for those images with
gdal_info, but it would be much easier to set up a tilemill instance, load
up a OSM bright style, then put the ECW images *on top* of that, so that
they hide the underlaying OSM map.

Extracting the bounding boxes seems like exactly the way to go.  I've seen
the output of gdal_info and that seems quite straightforward.  How do I then
use that in the way you have implied?

We used gdal_translate with ECW support to extract the images to Geotiffs.
The images increased in size dramatically - 27.6Mb to 1.2Gb in one case.  I
don't want to load a layer that big in size if I can avoid it.

[snip]

Yup. In the world of geo, you need to use an array of tools, not a magical
one-size-fits-all tool.

IMHO, one of your best bets is tilemill. You can load up some OSM extract,
apply the OSM bright style, put some raster data on top (maybe convert those
ECWs to another format to do so), then overlay your speed/accident data in
another layer.

Unfortunately the overlay layers will be dynamic requests, and probably
wouldn't be suitable for a desktop application.  Eg: We generate a report
with X incidents.  Each incident has a link to the mapserver that shows the
data.

Best,
--
Iván Sánchez Ortega <[email protected]> <[email protected]>

Regards,

Luke

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