[Geowanking] GeoSkating/GeoSailing : alternative maps needed

[Arnulf Christl]

Just van den Broecke wrote:
> Arnulf Christl wrote:
> 
>> Hi,
>> more to go... It might be helpful to understand a little about 
>> projections, coordinate systems (nothing new to a a sailor) and image 
>> formats. 
> 
> I am a rather newbie when it comes to GIS, not even a sailor, gradually 
> learning...
> 
>> You can create your own account at the Mapbender Portal, create your 
>> own interface and link into many worldwide WMS (including "Demis World 
>> Map" and "JPL World Map Service - worldwide satellite imagery").
>> http://wms1.ccgis.de/mapbender
> 
> great!
> 
> 
>> Best,
>> Arnulf.
>>
>> PS:
>> I am interested in how you got your GPS tracks into the map. We are 
>> currently thinking of how to best implement a feature to upload and 
>> add GPS tracks directly to a standardized WMS server. Probably we will 
>> stick to how the OpenStreetMap guys did it, but i believe they still 
>> do not have a WFS-T up and running but do it their own way.
> 
> 
> It's rather crude/static now: GPS data + annotations from clients are 
> logged into daylog files per user; every half hour (cronjob) a Java 
> program draws new maps (3 scales) onto map images if any GPS data was 
> added. All other data is in a DB. Media locations are derived from EXIF 
> date (email time for movies) by finding the nearest GPS sample in time 
> for that user on that day. I am also looking into a more dynamic/layered 
> approach. Looked into UMN and PostGIS but also liked the simpler 
> approach of OSM.
> 
> best,
> Just

Hi,
currently we load GPS tracks directly into the PostgreSQL PostgGIS 
database as WKT. Uploading the GPS tracks to a WFS-T would involve 
nothing much different, just create a GML from the GPS data - it could 
even contain loads of additional information we currently loose using 
dumb WKT. Problem are the many different GPS formats. Its a pain, Garmin 
right up at the front.
Once in the database every track immediately appears on the map or can 
be downloaded as GML. To publish a new GPS track the user needs nothing 
but a browser window.

After that a lot of statistical post processing could be done finding 
intersections, one-way sections, speed indices, etc. This is where OSM 
probably has a lot to tell.

Best,