![]() ![]() flt file is a similar format (ESRI binary grid file), but split into two files: an ASCII header (. These values are referenced horizontally, either to a Universal Transverse Mercator (UTM) projection or to a geographic coordinate system. The format, published by the USGS, allows internal documentation of coordinate system, date of publication, etc. dem files usually contain terrain elevations, but the file format can be used for representing any surface. Geological Survey (USGS) published the file format USGS DEM (as of 2006 USGS no longer directly distributes elevation data in the DEM format). ![]() From the shortcut menu, click Import Image(s) an Open browser window opens. To import a raster image:įrom the Study Tree, which is in the Study Pane, right-click on the Map Layers folder. The raster image formats supported by HEC-FIA are: JPEG format (. For more information on shapefiles, see the ESRI Shapefile Technical Description available here. shx file contains an index that links each shape to its record in the *. prj file contains the projection information for the shapefile. dbf file containing descriptive data called "attributes". shp file contains the shapes (points, polylines, or polygons) that are displayed in the layer. Usually there are four component files associated with a shapefile: *. Shapefiles store non-topological geometry and attribute information for the spatial features of a data set in a particular format. This file type is the native data structure for the ArcGIS® software. dxf format is commonly used for data exported from other CAD and GIS software. This format is a tagged data representation of an AutoCad® drawing file. dxf ) is created by a Computer-Aided Design (CAD) package, AutoCAD®. AutoCAD® DXF (.dxf)Ī Drawing Interchange File (. DLG files are vector representations of the data. ![]() The two sources are aerial photographs and cartographic sources. Geological Survey (USGS) Digital Line Graphs (DLGs) are created from two sources using manual and automated digitizing methods. Computation Point shapefile (i.e., ResSim_CCPs.shp).Storage Area shapefile (i.e., StorageAreas.shp).Cross Sections shapefile (i.e., CrossSections.shp).Study Area shapefile (i.e., USA_CountiesStudyArea.shp).Typical data map layers used but not required for a study include: Emergency planning zones shapefile (i.e., EPZ.shp).Census block, parcel, or structure point shapefile (i.e., Census_Block_Clip.shp).Stream centerline shapefile (i.e., RAS_River.shp).Typical data map layers required for a study include: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |