I'm sorry to reply to this - my subscription hadn't been accepted and the posting was rejected. I'm hoping that a reply will get through. I'm copying the entire posting only because it was originally rejected.
=================================================== tuckeratwork wrote: > > I'm just starting out on a project involving raster maps. I'm looking for > some basic guidance about things to consider - this is all pretty new to > me. > > I've read the Raster Data Access document written by Frank Warmerdam. > That was very well written and an excellent resource. > > My project involves loading a large set of overlapping nautical charts > from the UKHO with the objective of creating Google Maps/OSM-compatible > tiles. All of the charts are in GeoTiff format and are in various scales > and projections. They are non-rectangular and some have cutouts (which > were originally inset charts cut out into other GeoTiff files). Charts > with higher detail obviously overlap charts of lower detail. > > My current thought is to load everything into MapServer and then extract > the tiles needed and store them. Use of MapServer would be for internal > use only - I'm only interested in creating the tiles in png format. The > thing that I think MapServer will give me is the "quilting" together of > the different maps to create merged tiles. While most tiles are trivial, > the tiles at the borders are very complex because they need to be merged > with an underlying map possibly at a different scale (with a potential > non-square border). > > A really good example of this with US NOAA nautical charts can be seen at: > http://www.geogarage.com/main/examples.html.en#noaa > http://www.geogarage.com/main/examples.html.en#noaa > > As you zoom in there, you'll notice how the charts are all merged together > even though some tiles contain imagery from different scaled original > data. > > A few questions fall out of this: > > 1. Is this a reasonable way to accomplish this task? There are Google > tile cutters which would be great for cutting a single GeoTiff file - but > then I'd have the "quilting" issue to deal with between multiple sets of > tiles. MapServer seems like it'll do that quilting for me. > > 2. Can I define non-rectangular boundaries in the source data including > cutouts? Will MapServer quilt the other raster data to those boundaries > and inside the cutouts? > > 3. Are there any other resources that I should be reading and learning > about? > > > Thank you so much for any information you can provide. I'm sorry if some > of these questions are so very basic. I promise to try to be an active > member of the community as I learn enough to have something to contribute. > > Best regards, > > Tucker > > > > > > -- View this message in context: http://n2.nabble.com/Just-starting-out...-tp1481431p1481557.html Sent from the Mapserver - User mailing list archive at Nabble.com. _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
