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<html><head><title>MEM -- In Memory Raster</title></head><body bgcolor="#ffffff"><h1>MEM -- In Memory Raster</h1>GDAL supports the ability to hold rasters in a temporary in-memory format.This is primarily useful for temporary datasets in scripts or internalto applications. It is not generally of any use to application end-users.<p>Memory datasets should support support for most kinds of auxilaryinformation including metadata, coordinate systems, georeferencing, GCPs, color interpretation, nodata, color tables and all pixel data types.<p><h2>Dataset Name Format</h2>It is possible to open an existing array in memory. To do so, constructa dataset name with the following format:<pre> MEM:::option=value[,option=value...]</pre>For example:<pre> MEM:::DATAPOINTER=342343408,PIXELS=100,LINES=100,BANDS=3,DATATYPE=Byte, PIXELOFFSET=3,LINEOFFSET=300,BANDOFFSET=1</pre><ul><li> DATAPOINTER: pointer to the first pixel of the first band represented as a long integer. NOTE! This may not work on platforms where a long is 32 bits and a pointer is 64 bits. (required)<li> PIXELS: Width of raster in pixels. (required)<li> LINES: Height of raster in lines. (required)<li> BANDS: Number of bands, defaults to 1. (optional)<li> DATATYPE: Name of the data type, as returned by GDALGetDataTypeName() (eg. Byte, Int16) Defaults to Byte. (optional)<li> PIXELOFFSET: Offset in bytes between the start of one pixel and the next on the same scanline. (optional)<li> LINEOFFSET: Offset in bytes between the start of one scanline and the next. (optional)<li> BANDOFFSET: Offset in bytes between the start of one bands data and the next.</ul><h2>Creation Options</h2>There are no supported creation options.<p>The MEM format is one of the few that supports the AddBand() method.The AddBand() method supports DATAPOINTER, PIXELOFFSET and LINEOFFSET options to reference an existing memory array.<p></body></html>⌨️ 快捷键说明
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