|
|
| GeoCommunity Mailing List |
| |
| Mailing List Archives |
| Subject: | GISList: Best format for big data ? |
| Date: |
08/26/2002 09:48:17 AM |
| From: |
Stephanie Planche |
|
|
Hi list,
I looked for a world map, free for commercial usage. I got the one from NIMA
on VMAP0 format. I need only the boundaries and the administrative
subdivisions in the countries.To display the maps and interact with it, I
looked some java tools from open source projects and I found ones working
with ESRI shapefile format. So I converted my map from VMAP0 to shapefile
using the VPF Importer from NIMA.
I got a shapefile which is about 4 megs, just to draw the world and the
countries.
Now this is my problem : the display of the map is too much slow.
I must be able to display the world map quickly, and this with free tools
only :-( Until now to interact and to display the map, I tested Geotools and
OpenMap, which were good until I tested them with big data. Geotools works
with shapefile. OpenMap accepts several formats : DCW, VPF, VMAP, CADRG,
CIB, RPF, DTED and MapInfo.
So I would like to know :
- is it possible to get a smaller shapefile from the world with political
boundaries by converting VMAP0 with other softs or by using an other source
than the VMAP0 map from NIMA ?
- are there better formats than shapefile to deal with big data in general ?
I'm confused between looking for another world map in shapefile format, or
chosing another format or chosing other softs to interact with my map.
Thanks a lot for your help and your advices.
Stephanie.
______________________________________________________________________________
Pour mieux recevoir vos emails, utilisez un PC plus performant !
Decouvrez la nouvelle gamme DELL en exclusivite sur i (france)
http://www.ifrance.com/_reloc/signedell
To unsubscribe, write to gislist-unsubscribe@geocomm.com
________________________________________________________________________
Setup a GeoCommunity Account and have access to FAST DataDownloads
and Premium Career Posting at a discounted rate!
https://www.geocomm.com/cgi-bin/accounts/login
On-line Archives available at
http://spatialnews.geocomm.com/community/lists/
|
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
