[Talk-GB] OSM Analysis New Data and bot

Ed Loach ed at loach.me.uk
Tue Jun 14 10:00:57 BST 2011


It depends how you look at it. There is a lot of work involved in
correcting the .prj files (there are 11 for TM12 alone) and
reprojecting each set of shapes, though perhaps someone can script
something to automate the task. I can’t remember the update
frequency for the data from OS either, so it may be this could do
with repeating regularly. There is probably (I don’t know what the
existing code does) also a lot of work involved in getting Potlatch2
to understand the .prj files and reproject on the fly (especially if
the .prj files need tweaking automatically too) but it would only
need doing once (until the next set of shape files, at least).

 

Ed

 

 

From: Graham Jones [mailto:grahamjones139 at gmail.com] 
Sent: 14 June 2011 07:05
To: Ed Loach
Cc: talk-gb at openstreetmap.org; Richard Fairhurst
Subject: Re: [Talk-GB] OSM Analysis New Data and bot

 

I think it would be simpler to do the reprojection before uploading
it.  Only needs doing once that way.

Graham

from my phone

On 14 Jun 2011 04:11, "Ed Loach" <ed at loach.me.uk> wrote:

Richard wrote:

 

> The current Potlatch 2 codebase (not deployed yet) can pull
vectors

> directly...

OK, I'm having a sleepless night and my mind was wandering. It
passed briefly over crowd-sourced uploading of the data if whoever
sets up the account can share login or create multiple logins (I
have the May 2011 TM Vectormap stuff here). But then I remembered
what was involved with using the original release and wondered if
things have changed. I refer mainly to reprojecting from OSGB to
WGS84, which required manual tweaks to every .prj file [1]. Would
this need doing before upload, or is it something that is now (but
not deployed yet) automated within Potlatch 2?

 

Ed

 

[1]
http://wiki.openstreetmap.org/wiki/Using_OS_Shapefiles#Re-projecting
_the_shape_file 


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