[Talk-us] tiff, dwg and nad83
Randal Hale
rjhale at northrivergeographic.com
Sun Apr 15 20:53:11 BST 2012
So I missed the whole exchange - so I read what little I see below and
here are my thoughts.....
I don't think it's too GIS geeky - it's too OSM geeky. There are too
many ways to get to a common goal - adding data. You can import, GPS,
walk around, etc etc.
There almost needs to be a list serve or a forum for new people -
somewhere you can walk people through editing woes and problems. I agree
- this list does get too bogged down in details.
Don't take the following as a complaint - but is someone says "So lets
say that I ask for a sample GeoTIFF, which I assume is just a big
graphic file similar to any other TIFF file (or jpg or whatever)" an
answer of "For the first one you install gdal with python bindings, run
gdal2tiles" (and it's a Excellent answer and I'm going to try it myself
on a geotiff I have here) but it's going to be too confusing for someone
new especially someone in the potlatch arena or a new user just getting
started.
Don't assume a technical question needs a technical answer. Start Simple
- build from there.
Randy
Randal Hale, GISP
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
twitter:rjhale
http://about.me/rjhale
On 4/15/2012 2:37 PM, Charlotte Wolter wrote:
> The exchange between Frank Cox and others about importing data is a
> perfect example of an ongoing problem with this list: Many of the
> discussions and "answers" are simply too GIS geeky for the vast
> majority of us.
> Frank asked for a simple "do x then do y" kind of explanation. Several
> members replied, but no one but Paul Norman tried to give him that
> kind of answer. Unfortunately, Paul's answer contained a lot of GIS
> technical language. Obviously, he's very knowlegeable, but he didn't
> put the explanation at a level where Frank and the rest ofus could
> understand it.
> That's why reading the list often is frustrating. There's a lot of
> talk about technical issues and minutiae, but little guidance for
> those of us who just want to map using Potlatch 2, which is most of
> us. (By the way, what is a "network," and where is it in Potlatch
> coding?) Also, sometimes there are snippy disputes about issues that
> seem obscure, which makes the list occasionally unpleasant to read.
> Again, for those of us who just want to map, this isn't helpful.
> What can be done to make Talk-US more useful for the average mapper?
>
> Charlotte
>
>
> At 04:59 PM 4/14/2012, you wrote:
>> > From: Frank Cox [mailto:theatre at melvilletheatre.com]
>> > Subject: Re: [Imports] tiff, dwg and nad83
>> >
>> > On Sat, 14 Apr 2012 15:34:49 -0700
>> > Paul Norman wrote:
>> >
>> > > What I would suggest is to start with the GeoTiffs and go from there.
>> >
>> > All righty, now we're getting somewhere.
>> >
>> > So lets say that I ask for a sample GeoTIFF, which I assume is just a
>> > big graphic file similar to any other TIFF file (or jpg or whatever).
>> > The engineering department has these things (we assume), so he gives me
>> > a copy of one of them.
>> >
>> > I carry this thing home on my trusty flash drive (or whatever), plug it
>> > into my computer, and now I have a graphic file on my computer that I
>> > didn't have before.
>> >
>> > What now?
>>
>> Depending on how big it is, you can either tile it with gdal2tiles[1] or
>> serve it with mapserver[2].
>>
>> For the first one you install gdal with python bindings, run
>> gdal2tiles on
>> the geotiff, use a script (http://paste.ubuntu.com/928312/) to fix some
>> names, and serve that with apache. JOSM or Potlatch can then use it as a
>> background layer.
>>
>> For the second one you install gdal and mapserver and tell it to
>> serve the
>> geotiff and then you can add it as a background layer with JOSM or
>> Potlatch.
>>
>> I had a look at your town and given that it's a very small town and
>> the bing
>> imagery is actually quite good, I don't know that it's worth doing
>> any sort
>> of import. If you wanted street names you could get them from
>> CanVec[3]. Of
>> course collecting street names also gives you a chance to tag businesses,
>> amenities, etc.
>>
>> [1] http://gdal.org/
>> [2] http://mapserver.org/
>> [3] http://wiki.openstreetmap.org/wiki/CanVec
>>
>>
>>
>> _______________________________________________
>> Imports mailing list
>> Imports at openstreetmap.org
>> http://lists.openstreetmap.org/listinfo/imports
>
> Charlotte Wolter
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