This option loads the pixel rows and columns as coordinates in the current projection. Select Position to Use for Layer Manually Rectify Image Fake Coordinate to Allow for Viewing gcp file of the same file name, the following set of options will be available: If there are no control points defined in the image header or included in a world file or. To control this behavior see Raster Formats Configuration Many image applications also provide options for geotagging, which includes this EXIF data in the image metadata. Most modern digital cameras record EXIF data with the coordinates where the image was taken. JPEG images may also contain EXIF data in the image metadata. If only the control points are defined, there will be a prompt to confirm the coordinate system. prj file will define the projection of that system. gcp file will be used as control points to relate the raster pixels to a coordinate system. gcp file with the same file name in the same folder as the raster, that information will be used to spatially locate the data for any supported raster format.Ī world file or. This may include formats that do not support spatial reference information, or spatial data formats that are missing spatial reference information. Global Mapper can import images files that do not contain spatial reference information. Loading Rasters/ Images with No Spatial Reference Information

Loading as an image file enables raster options such as Color/Contrast Adjustment.

If the file is an image file, choose No to load the file as an image. This will allow for changing the display using the elevation shader, viewing in 3D with pixel values representing heights, and running raster tools that work with elevation data, such as generating contours. If the raster represents elevation data or other numerical values that represent quantities, choose Yes to load the data an elevation grid. This typically has to do with the bit depth and number of bands in the file. The following dialog will appear for some data when the type can not be determined, asking to specify the characteristics of the data set.

Global Mapper recognizes many raster file formats, but can not always determine if the file represents elevation data or imagery. Loading Rasters of Unknown Type (elevation or imagery)

Exif data viewer coordinates