From: HB-GRAL <fli...@sa...> - 2012-04-22 23:24:28
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Am 14.03.12 15:20, schrieb HB-GRAL: > Hi all > > As you can read in the log of the IRC meeting 2012-03-11 we are trying > to evaluate an isolated region to see what comes up with OSM data. > Bolivia was chosen by accident for the moment. > > I’m not aware how the current OSM data on the scenery mapserver has been > imported, so I did a new import/export with recent data, distributed by > geofabrik.de. It is raw data as it is, but the shapefiles are splitted > by queries into Hi all There is some progress here creating new bolivian scenery with recent terragear-cs (using genapts850 and reworked fgfs-construct, many thanks to Chris and Peter and all other terragear-cs workers!). > > LINE: > - Canal, River, Stream (and many other features) I compared OSM data with "Recursos Hidricos" shapes available here http://essm.tamu.edu/bolivia/index_en.htm . Looks like I can get much more detailed data from this resource for my experiment. Experiment? I started to import river data as lines in grass and buffer that data with width (estimated) to polygons instead of feeding lines to Terragear. After buffering I use grass vector generalization algorithms (snake, sliding) to get a more "natural" looking polygon output. This is my personal water-features-creation-theory to get better looking river/stream scenery. Example: http://download.fgx.ch/screens/snakeslide.png > - Motorway, Primary, Secondary, Tertiary, Trunk, Road, Track, Residential > - Taxiway, Runway > - Railway Roads is the core of OSM and much more detailed than other available data, I will take that from OSM and feed it as lines for my next terragear-cs run. Makes me nervous. > > POLYGON: > - Industrial > - Residential > - Lake, Wetland Also here I get more recent data from the tamu.edu source above for the moment. I clipping this shapes to topologically clean shapefiles recently. "Topologically clean", the terragear word of the year ;-) The first pass of a 4x4 degree chunk (with 8.50 airports, new lake/forest and height data, but without OSM data) went very well using the updated toolchain. I checked the scenery with FlightGear 2.6.0 and it looks very nice. Curtis, when you’re going to explain again the slope calculation to someone else (me I got it now I think), maybe you can illustrate this with this very interesting airport at Titicaca Lake here: http://download.fgx.ch/screens/tititataaa.png) ;-) Ok, I will update this 8.50 airport data, looks like it is to artificial. This week I will start to generate the same 4x4 chunk with OSM data included and make it available for everyone who is interested looking into this data. And also when all my experiments fails, it’s a nice experience here working for scenery again. And my updated shapefiles from bolivia can come to flightgear scenery with or without OSM streets later, it’s a huge update I guess for this region, compared to recent available scenery data. Cheers, Yves |