Open raster format7/9/2023 Each pixel is positioned at one of the grid-points, and every grid-point has a pixel positioned on it. A single point of colour in the raster image is known as a pixel. What are raster images?Ī raster image is one formed by a 2-dimensional rectangular grid coloured by points. For more information on reconstructing rasters please see the Layers chapter. GPlates can also reconstruct rasters back in geological time with the assistance of a set of static polygons (static meaning the shape of the polygons do not change in contrast to topological plate polygons which have dynamic shapes - see the Topology Tools chapter). GPlates has the facility to display raster images on the 3D globe (and the 2D map views). For example you can load a Shapefile directly into GPlates without first having to import it into GPML format. Note that features containing vector geometries (points, polylines and polygons) do not require an import process. After that you can simply load the GPML file (created during the import process) into GPlates like you would a regular feature collection (as covered in the Loading and Saving chapter). The import only needs to be done once for each raster or scalar field. It also associates the raster or scalar field with a GPML file. This pre-processes the data into a form that is efficient for GPlates to load. Before a raster image or 3D scalar field data can be loaded into GPlates it must first be imported.
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