On 10/03/06, David Megginson <[EMAIL PROTECTED]> wrote: > GSHHS is excellent for ocean shorelines and bays, but wildly > inaccurate for large inland bodies of water (especially the Great > Lakes). It often puts the shoreline more than 1km off from where it > should be, so that airports near the shore end up far out in the water > or far inland. VMAP0 is relatively low resolution, but it gets the > Great Lakes shorelines in more-or-less the right place.
Here's an example of the west end of Lake Ontario. Note the extra detail in the Vmap0 vs. the GSHHS, and also the fact that the GSHHS puts much of downtown Toronto under water (I think it represents the future after global warming): http://document.ihg.uni-duisburg.de/cgi-bin/mapserv40?layer=lakes_lake&layer=lakes_intermittentlake&layer=cities_urban&layer=gshhs_lakes&layer=gshhs_islands&layer=gshhs_ponds&zoomdir=1&zoomsize=1&imgxy=300.0+300.0&imgext=-80.490972+42.550702+-78.374302+44.667372&map=%2Fhome%2Fmas%2FWWW%2Flandcover%2Flandcover.map&root=%2Flandcover&savequery=true&program=%2Fcgi-bin%2Fmapserv40&map_web_imagepath=%2Fhome%2Fmas%2FWWW%2Ftmp%2F&map_web_imageurl=%2Ftmp%2F&map_web_template=main.html If that long link broke in your e-mail reader, try this one: http://makeashorterlink.com/?J252326CC The problem might be that TerraGear is now cropping against just the landmass -- it actually has to crop against the union of the landmass, islands, lakes, and everything else. All the best, David -- http://www.megginson.com/ ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
