One of the primary tasks of the USGS was to create accurate maps of the United States, and in 1884, one of the first USGS topographical maps was published. This map covered an area of 4,000 square miles in central Montana and was created using the latest surveying and mapping techniques ...
Topographic Map Index 1:250,000 - USGSdoi:Server=earth; Service=esri_sde; User=gislib; Version=SDE.DEFAULTThis dataset is the Quadrangle Index 1:250,000 scale for the 1 degree by 2 degree statewide quadrangle grid, NAD 1983 tile boundaries....
DRG - USGS 1:250,000 Topographic MapDRG - USGS 1:250,000 Topographic Mapdoi:\\\WINDEX\\SJR\\gislib\\scanmaps\\drg250\\coll_off\\c26080_hpgn.tifThe digital raster graphics (DRG) are scanned images of the U.S. Geological Survey 1-degree by 2-degree topographic map that have been...
aThe color key set is constructed in four steps. First, all of the possible color combinations present in the map are determined. For USGS topographic maps, this process results in three solid color keys (white, green, and red) and eight combination color keys (black on white, black on ...
Ebranta technologies innovative software TopoPointUSA GPS enabled cell phone application display United States Geological Survey USGS high resolution topographical map images position online or not eTuner chromatic instrument tuner and musical pitch anal
I am only aware of two packages which mention the USGS National Map API: quickmaprprovides the ability to download a topographic basemap for use in plotting.The URL useddoes not overlap with the APIs included in this package, and I believe is not actually part of the National Map at all ...
Finally, an A* search algorithm is used to link valleys together to form linear features and to close the gaps caused by intersecting features. The performance of the algorithm is tested on a number of USGS topographic map samples. 展开 ...
Aerial photography, topographic maps, high-resolution satellite imagery, and global positioning system (GPS) data were compiled in ArcMAP and analyzed usin... SH Nebel,TDC Barber - 《Journal of Coastal Research》 被引量: 34发表: 2012年 加载更多研究...
TheNational Map data are available through a viewer and download platform providing access to eight primary data themes, plus the US Topo and scanned historical topographic maps. The eight themes are elevation, orthoimagery, hydrography, geographic names, boundaries, transportation, structures, and ...
Topographic Map Index 1:24,000 - USGSdoi:Server=earth; Service=esri_sde; Database=sde; User=gislib; VersiThis dataset is the Quarter Quad Index 1:24,000 scale for the 7.5 min statewide quadrangle grid, 1983 boundaries.Florida Marine Research Institute (data source)...