Wei, In that case you may also want to consider vectorisation tools/algorithms. GDAL has some of them.
Here is a starting point for your search. http://opensourcegis.org/ http://en.wikipedia.org/wiki/List_of_GIS_software On Tue, Dec 29, 2009 at 8:55 AM, weixj2003ld <[email protected]> wrote: > Hi, > Thank you for your answer in time. > I do not want to display a satellite photo file in plane picture. > I want to display it 3D picture, that is, a satellite photo file may > contains mountains,gorge etc,If I display it in 3D picture(shows as > attachment),I can show it to user vividly. > could you tell me some opensource tool that can display GDAL raster data in > 3D viewer? > Thank you. > Kind regards. > > 在2009-12-29，"Chaitanya kumar CH" <[email protected]> 写道： >>Wei, >> >>Can you give some explanation on what exactly you mean by 3D view. Is >>it enough to show the elevations on a 2D image or do you want to >>display a 3D with changeable perspective? >> >>Elevation display on a 2D image is straight forward. 3D modelling is >>more involved. >> >>On Tue, Dec 29, 2009 at 8:19 AM, weixj2003ld <[email protected]> wrote: >>> Hi,Thank you for your answer in detail. >>> I want to display the satellite photo file in 3D,what open source tool >>> can >>> do it,could you give me some advance? >>> Kind regards. >>> wei >>> >>> >>> 在2009-12-29，"Chaitanya kumar CH" <[email protected]> 写道： >>>>Wei, >>>> >>>>On Tue, Dec 29, 2009 at 2:57 AM, weixj2003ld <[email protected]> wrote: >>>>> Hi,Thk u for your answer. >>>>> 1.I want to use GDAL to get information about a satellite photo >>>>> file,such >>>>> as >>>>> x,y,z,and the value of each poiont,could GDAL do that? >>>> >>>>You can certainly use GDAL for this. Refer to >>>> http://gdal.org/gdal_tutorial.html >>>> >>>>> 2.In gereral,the size of a satellite photo file is large(such as >>>>> 100M),I >>>>> want to display it in a 3D viewer,which tool can display it >>>>> sooner,Openev?or >>>>> other? >>>> >>>>GDAL is routinely used to read files larger than 100MB. >>>>openev is a tool to view raster images in 2D. opevev uses GDAL for >>>>retrieving raster data. >>>> >>>>Once you have everything working, you can tweak some stuff for a >>>>performance boost. >>>> >>>>> Kind regards. >>>>> Wei >>>>> >>>>> >>>>> 在2009-12-28，"Chaitanya kumar CH" <[email protected]> 写道： >>>>>>Wei, >>>>>> >>>>>>2009/12/28 weixj2003ld <[email protected]>: >>>>>>> Hi, >>>>>>> 1.I get a satellite photo file,and its extention is .tif，and how get >>>>>>> the >>>>>>> (x,y,z) and the value of each poiont? >>>>>>tif is the extension for TIFF file format. You may be able to view the >>>>>>file in a normal image viewer. But you should be able to to view the >>>>>>coordinates and stuff in a geographic raster viewer like openev. >>>>>>Google for more viewers. >>>>>> >>>>>>> 2.Could you tell me the article which introduces the format of >>>>>>> satellite >>>>>>> photo file in detail? >>>>>>There is no specific format for satellite imagery. Your image is >>>>>>probably a processed form of a satellite image. >>>>>> >>>>>>> 3.Is tif the only format of satellite photo file? >>>>>>No. Refer to http://gdal.org/formats_list.html the list of raster >>>>>>formats supported by GDAL. >>>>>> >>>>>>> Best regards. >>>>>>> Wei >>>>>>> _______________________________________________ >>>>>>> gdal-dev mailing list >>>>>>> [email protected] >>>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>>>>> >>>>>> >>>>>>-- >>>>>>Best regards, >>>>>>Chaitanya kumar CH. >>>>>>/tʃaɪθənjə/ /kʊmɑr/ >>>>>>+91-9848167848 >>>>>>17.241582N 80.142635E >>>>> >>>>> >>>>> >>>> >>>> >>>> >>>>-- >>>>Best regards, >>>>Chaitanya kumar CH. >>>>/tʃaɪθənjə/ /kʊmɑr/ >>>>+91-9848167848 >>>>17.241582N 80.142635E >>> >>> >>> >> >> >> >>-- >>Best regards, >>Chaitanya kumar CH. >>/tʃaɪθənjə/ /kʊmɑr/ >>+91-9848167848 >>17.241582N 80.142635E > > > -- Best regards, Chaitanya kumar CH. /tʃaɪθənjə/ /kʊmɑr/ +91-9848167848 17.241582N 80.142635E _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
