Oliver C wrote: > I have a question about this. > Yesterday i visited the terragear Project website > an read at the following page > ( > http://terragear.sourceforge.net/docs/scenery-tutorial/fg-scenery-tutorial.html > ) about vmap that sentence: > > > "This dataset (formerly known as the Digital Chart of the World) contains > non-airport vector data for > all of North America, including landmass (shorelines), lakes, rivers, cities, > towns, roads, railroads, > rivers, landcover, and many other coverages that we are not using yet."
This dataset is only accurate and complete to create maps at the scale 1:1.000.000. They do not match well compared to data at 1:25.000 ( topo maps ). For exemple, it doesn't include the width of rivers. > Now my question is, why are you don't using those vmap data? vmap was used to build the latest scenery at randtechnologies by William Riley ( see the download page ) > And if you use those, at what detail do you use them? > At maximum detail: everything the vmap data gives or lower details to save > framerates or internet hosting costs? > > I also visited the the FlightGear Scenery Designer Home Page > which is for creating excat sceneries but the terragear website > says: > "TerraGear generates FlightGear scenery automatically from free, > publicly-available geographical datasets: you do not have to (and are > currently not able to) paint roads, rivers, and so forth by hand." > > So my question is when i don't have to create those things by hand because > vmap data is available and accurate enough why do i need that Scenery > Designer to modify the landscape? > (That i need it for buildings too is obvious, that's not what i mean) It depend on how accurate you want your scenery. If it is OK for you to see the rivers at the top of mountains, crops instead of forrest, and missing lakes, FGSD is useless for you. But you wouldn't cure the whole world with fgsd. It would be more efficient to find a better dataset, but I am afraid they are not free. > Or other question, are the vmap data (especially Areas over Europ) not > accurate enough so that i have to use the Scenery Designer and > edit the landscape by hand? > (like on those screenshots: http://fgsd.sourceforge.net/screenshots.html) vmap0 seems to be evenly (not) accurate around the world, but good terrain elevation at good accuracy ( 90m or less ) is not freely available ( yet ?) for outside America ( that is new. I year ago, it was only US ). FGSD is there to enhance scenery by hand using image data ( map, aerial photo ). This is only applicable for very narrow areas ( a town or an airport ). ( Disclaimer: FGSD, which I maintain, is for from being usable for anything else than placing 3D object in the scenery for the moment. And I am distracted creating 3D models for fg ) ... > > > Their would be a problem of hosting those models that don't fit > > in the base package. > > So if i edit some sceneries does that mean that they wouldn't be added to the > additional scenery data? > http://www.flightgear.org/Downloads/world-scenery.html The world is based on data ( height, contours, airports ). If you don't have data made by other at hand ( building, bridge, special hand-edited contours ), they will not appear in the scenery. -Fred _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
