osgearth处理大tiff文件:利用VPB工具构建静态四叉树,使用osgearth加载成为地形层
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osgearth处理大tiff文件:利用VPB工具构建静态四叉树,使用osgearth加载成为地形层
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1.使用VPB工具處理tif
osgdem -t image.tif --wkt-file wkt.prj -l 20 --PagedLOD -o tj_out.ive2.osgearth加載earth文件
<map name="Virtual Planet Builder model" type="projected" version="2"><image name="imagery" driver="vpb"><url>tj_out.ive</url><primary_split_level>20</primary_split_level><secondary_split_level>20</secondary_split_level><profile name="UTM12"><srs>PROJCS["Beijing_1954_3_degree_Gauss_Kruger_CM_111E",GEOGCS["GCS_Beijing 1954",DATUM["D_Beijing_1954",SPHEROID["Krasovsky_1940",6378245,298.3]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",111],PARAMETER["scale_factor",1],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1],AUTHORITY["EPSG","2434"]]</srs><xmin>592462.903</xmin><xmax>612708.420</xmax><ymin>3155407.106</ymin><ymax>3169627.225</ymax></profile><directory_structure>task</directory_structure></image><!--heightfield name="dem" driver="vpb"><url>newout\prova.ive</url><profile name="UTM12"><srs>+proj=utm +zone=12 +ellps=WGS84 +datum=WGS84</srs><xmin>694730</xmin><xmax>800326</xmax><ymin>2832951</ymin><ymax>3047272</ymax></profile></heightfield --><options><profile name="UTM12"><srs>PROJCS["Beijing_1954_3_degree_Gauss_Kruger_CM_111E",GEOGCS["GCS_Beijing 1954",DATUM["D_Beijing_1954",SPHEROID["Krasovsky_1940",6378245,298.3]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",111],PARAMETER["scale_factor",1],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1],AUTHORITY["EPSG","2434"]]</srs><xmin>592462.903</xmin><xmax>612708.420</xmax><ymin>3155407.106</ymin><ymax>3169627.225</ymax></profile></options> <feature_mask name="mask"><features driver="ogr"><geometry>POLYGON(( 597462 3158962 0, 606462 3158962 0, 606462 3162517 0, 597462 3162517 0)) </geometry></features><profile><srs>PROJCS["Beijing_1954_3_degree_Gauss_Kruger_CM_111E",GEOGCS["GCS_Beijing 1954",DATUM["D_Beijing_1954",SPHEROID["Krasovsky_1940",6378245,298.3]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",111],PARAMETER["scale_factor",1],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1],AUTHORITY["EPSG","2434"]]</srs></profile></feature_mask><!--external><decluttering><out_animation_time> 0.0 </out_animation_time><in_animation_time> 0.25 </in_animation_time><min_animation_scale> 0.45 </min_animation_scale><min_animation_alpha> 0.35 </min_animation_alpha><sort_by_priority> true </sort_by_priority></decluttering></external--></map>總結
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