[Talk-ht] TopoMap 1:50k Was: Onboarding new mappers
ce-test, qualified testing bv - Gert Gremmen
g.gremmen at cetest.nl
Sat Feb 13 14:51:18 GMT 2010
Right, I use the topo map mainly for fining names of regions, and hamlet
and mountain peaks...
It's too old anyway to trace roads with.
Use it with the satellite images only !
Regards,
Ing. Gert Gremmen
g.gremmen at cetest.nl <mailto:g.gremmen at cetest.nl>
www.cetest.nl
Kiotoweg 363
3047 BG Rotterdam
T 31(0)104152426
F 31(0)104154953
P Before printing, think about the environment.
Van: talk-ht-bounces at openstreetmap.org
[mailto:talk-ht-bounces at openstreetmap.org] Namens David Groom
Verzonden: Saturday, February 13, 2010 3:01 PM
Aan: talk-ht at openstreetmap.org
Onderwerp: [Talk-ht] TopoMap 1:50k Was: Onboarding new mappers
Certainly the west around the Dame Marie & Jeremie areas, the topomap
1:50k layer is way out of alignment with any other data source. Its
seems OK in other areas I have looked at.
Its Ok if you have really recognisable features such as a coastline to
re-align the topomap layer, but I fear inland that much data may be
traced by less experienced mappers which is simply in the wrong place.
David
----- Original Message -----
From: ce-test, qualified testing bv - Gert Gremmen
<mailto:g.gremmen at cetest.nl>
To: talk-ht at openstreetmap.org
Sent: Friday, February 12, 2010 2:57 PM
Subject: Re: [Talk-ht] Onboarding new mappers
There is a huge amount of stuff to map in rural areas.
1. Install java en download JOSM
2. Install the WMS plug-in
3. Choose a rural area somewhere, not to big and download
data
4. play around and study JOSM for an hour or so, ask
questions if you need to
5. Install WMS layers "best aerial" and TOPO 50K
6. JOSM may shift layers so as to align them, to already
avalaible data : the topo map below is less then 100 meter off however.
7. compare and map rivers, hamlets, roads (most tracks
anyway) land slidings , important buildings mountain peaks
8. The tope map gives you a wealth of names and places
and mountains peaks to map
9. The areal pictures show you roads, buildings and rivers
(depends on available resolution in your area)
10. Study, compare and add missing items
11. Report the area you are working on to this list (topo map
reference lines ?) to avoid duplicates
WMS links for JOSM
best aerial :
http://hypercube.telascience.org/cgi-bin/mapserv?map=/geo/haiti/mapfiles
/4326.map&layers=haiti-best&request=GetMap&version=1.0.0&styles=&format=
image/jpeg&service=WMS&
topomap 1:50K (all of Haiti)
http://hypercube.telascience.org/cgi-bin/mapserv?map=/home/ortelius/hait
i/haiti.map&layers=haiti-tlm-50&request=GetMap&version=1.0.0&styles=&for
mat=image/jpeg&service=WMS&
Well you also might map using the potlatch editor, but you won't
have 2 layers to switch to,
and while potlatch is easier to start with ..... JOSM will do
much better and accurate mapping,
and has some features (like Q : make a building or area
square-angled) and add-node-on-the fly
You should see me mapping rivers / areas with that, that you
will miss very much.
Oh, do not forget to connect roads to roads, other wise a router
may never find them.
Loose roads are of no use .
Well, see for yourself.
Gert Gremmen
Regards
Karl
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