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GDAL_GRID(1) GDAL GDAL_GRID(1) NAME gdal_grid - Creates regular grid from the scattered data. SYNOPSIS gdal_grid [--help] [--help-general] [-ot {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/ CInt16/CInt32/CFloat32/CFloat64}] [-oo <NAME>=<VALUE>]... [-of <format>] [-co <NAME>=<VALUE>]... [-zfield <field_name>] [-z_increase <increase_value>] [-z_multiply <multiply_value>] [-a_srs <srs_def>] [-spat <xmin> <ymin> <xmax> <ymax>] [-clipsrc <xmin> <ymin> <xmax> <ymax>|<WKT>|<datasource>|spat_extent] [-clipsrcsql <sql_statement>] [-clipsrclayer <layer>] [-clipsrcwhere <expression>] [-l <layername>]... [-where <expression>] [-sql <select_statement>] [-txe <xmin> <xmax>] [-tye <ymin> <ymax>] [-tr <xres> <yres>] [-outsize <xsize> <ysize>] [-a {<algorithm>[[:<parameter1>=<value1>]...]}] [-q] <src_datasource> <dst_filename> DESCRIPTION This program creates a regular grid (raster) from the scattered data read from the OGR datasource. Input data will be interpolated to fill grid nodes with values, you can choose from various interpolation methods. It is possible to set the GDAL_NUM_THREADS configuration option to paral- lelize the processing. The value to specify is the number of worker threads, or ALL_CPUS to use all the cores/CPUs of the computer. TIP: Equivalent in new "gdal" command line interface: See gdal vector grid. --help Show this help message and exit --help-general Gives a brief usage message for the generic GDAL commandline options and exit. -q, --quiet Suppress progress messages and other non-error output. -ot <type> Force the output image bands to have a specific data type supported by the driver, which may be one of the following: Byte, Int8, UInt16, Int16, UInt32, Int32, UInt64, Int64, Float32, Float64, CInt16, CInt32, CFloat32 or CFloat64. If not set then a default type is used, which might not be supported by the relevant driver, causing a error. -of <format> Select the output format. If not specified, the format is guessed from the extension. Use the short format name. -txe <xmin> <xmax> Set georeferenced X extents of output file to be created. -tye <ymin> <ymax> Set georeferenced Y extents of output file to be created. -tr <xres> <yres> Set output file resolution (in target georeferenced units). Note that -tr just works in combination with a valid input from -txe and -tye Added in version 3.2. -outsize <xsize> <ysize> Set the size of the output file in pixels and lines. Note that -outsize cannot be used with -tr -a_srs <srs_def> Override the projection for the output file. The srs_def may be any of the usual GDAL/OGR forms, complete WKT, PROJ.4, EPSG:n or a file containing the WKT. No reprojection is done. -zfield <field_name> Identifies an attribute field on the features to be used to get a Z value from. This value overrides the Z value read from the feature geometry record (naturally, if you have a Z value in the geometry, otherwise you have no choice and should specify a field name con- taining a Z value). -z_increase <increase_value> Addition to the attribute field on the features to be used to get a Z value from. The addition should be the same unit as the Z value. The result value will be Z value + Z increase value. The default value is 0. -z_multiply <multiply_value> This is multiplication ratio for the Z field. This can be used for a shift from e.g. feet to meters or from elevation to depth. The re- sult value will be (Z value + Z increase value) * Z multiply value. The default value is 1. -a {<algorithm>[[:<parameter1>=<value1>]...]} Set the interpolation algorithm or data metric name and (optionally) its parameters. See the Interpolation algorithms and Data metrics sections for further discussion of available options. -spat <xmin> <ymin> <xmax> <ymax> Adds a spatial filter to select only features contained within the bounding box described by (xmin, ymin) - (xmax, ymax). -clipsrc [<xmin> <ymin> <xmax> <ymax>]|<WKT>|<datasource>|spat_extent Adds a spatial filter to select only features contained within the specified bounding box (expressed in source SRS), WKT geometry (POLYGON or MULTIPOLYGON), from a datasource or to the spatial ex- tent of the -spat option if you use the spat_extent keyword. When specifying a datasource, you will generally want to use it in combi- nation with the -clipsrclayer, -clipsrcwhere or -clipsrcsql options. -clipsrcsql <sql_statement> Select desired geometries using an SQL query instead. -clipsrclayer <layername> Select the named layer from the source clip datasource. -clipsrcwhere <expression> Restrict desired geometries based on an attribute query. -l <layername> Indicates the layer(s) from the datasource that will be used for in- put features. May be specified multiple times, but at least one layer name or a -sql option must be specified. -where <expression> An optional SQL WHERE style query expression to be applied to select features to process from the input layer(s). -sql <select_statement> An SQL statement to be evaluated against the datasource to produce a virtual layer of features to be processed. -oo <NAME>=<VALUE> Added in version 3.7. Source dataset open option (format specific) -co <NAME>=<VALUE> Many formats have one or more optional creation options that can be used to control particulars about the file created. For instance, the GeoTIFF driver supports creation options to control compression, and whether the file should be tiled. The creation options available vary by format driver, and some sim- ple formats have no creation options at all. A list of options sup- ported for a format can be listed with the --format command line op- tion but the documentation for the format is the definitive source of information on driver creation options. See Raster drivers for- mat specific documentation for legal creation options for each for- mat. <src_datasource> Any OGR supported readable datasource. <dst_filename> The GDAL supported output file. INTERPOLATION ALGORITHMS There are a number of interpolation algorithms to choose from. More details about them can also be found in GDAL Grid Tutorial invdist Inverse distance to a power. This is the default algorithm. It has the fol- lowing parameters: * power: Weighting power (default 2.0). * smoothing: Smoothing parameter (default 0.0). * radius1: The first radius (X axis if rotation angle is 0) of the search ellipse. Set this parameter to zero to use the whole point array. De- fault is 0.0. * radius2: The second radius (Y axis if rotation angle is 0) of the search ellipse. Set this parameter to zero to use the whole point array. De- fault is 0.0. * radius: Set first and second radius (mutually exclusive with radius1 and radius2). Default is 0.0. Added in GDAL 3.6 * angle: Angle of search ellipse rotation in degrees (counter clockwise, default 0.0). * max_points: Maximum number of data points to use. Do not search for more points than this number. This is only used if the search ellipse is set (both radii are non-zero). Zero means that all found points should be used. Default is 0. * min_points: Minimum number of data points to use. If less amount of points found the grid node considered empty and will be filled with NO- DATA marker. This is only used if search ellipse is set (both radii are non-zero). Default is 0. * max_points_per_quadrant: Maximum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. When specified, this actually uses invdistnn implementation. * min_points_per_quadrant: Minimum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. When specified, this actually uses invdistnn implementation. * nodata: NODATA marker to fill empty points (default 0.0). invdistnn Inverse distance to a power with nearest neighbor searching, ideal when max_points is used. It has following parameters: * power: Weighting power (default 2.0). * smoothing: Smoothing parameter (default 0.0). * radius: The radius of the search circle, which should be non-zero. De- fault is 1.0. * max_points: Maximum number of data points to use. Do not search for more points than this number. Found points will be ranked from nearest to fur- thest distance when weighting. Default is 12. * min_points: Minimum number of data points to use. If less amount of points found the grid node is considered empty and will be filled with NODATA marker. Default is 0. * max_points_per_quadrant: Maximum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. When specified, the algorithm will only take into account up to max_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * min_points_per_quadrant: Minimum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. If that number is not reached, the point being interpolated will be set with the NODATA marker. When specified, the algorithm will collect at least min_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * nodata: NODATA marker to fill empty points (default 0.0). When min_points_per_quadrant or max_points_per_quadrant is specified, the search will start with the closest point to the point being interpolated from the first quadrant, then the closest point to the point being interpo- lated from the second quadrant, etc. up to the 4th quadrant, and will con- tinue with the next closest point in the first quadrant, etc. until max_points and/or max_points_per_quadrant thresholds are reached. average Moving average algorithm. It has following parameters: * radius1: The first radius (X axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius2: The second radius (Y axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius: Set first and second radius (mutually exclusive with radius1 and radius2). Default is 0.0. Added in GDAL 3.6 * angle: Angle of search ellipse rotation in degrees (counter clockwise, default 0.0). * max_points: Maximum number of data points to use. Do not search for more points than this number. Found points will be ranked from nearest to fur- thest distance when weighting. Default is 0. Added in GDAL 3.6 Only taken into account if one or both of min_points_per_quadrant or max_points_per_quadrant is specified * min_points: Minimum number of data points to use. If less amount of points found the grid node considered empty and will be filled with NO- DATA marker. Default is 0. * max_points_per_quadrant: Maximum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. When specified, the algorithm will only take into account up to max_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * min_points_per_quadrant: Minimum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. If that number is not reached, the point being interpolated will be set with the NODATA marker. When specified, the algorithm will collect at least min_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * nodata: NODATA marker to fill empty points (default 0.0). Note, that it is essential to set search ellipse for moving average method. It is a window that will be averaged when computing grid nodes values. When min_points_per_quadrant or max_points_per_quadrant is specified, the search will start with the closest point to the point being interpolated from the first quadrant, then the closest point to the point being interpo- lated from the second quadrant, etc. up to the 4th quadrant, and will con- tinue with the next closest point in the first quadrant, etc. until max_points and/or max_points_per_quadrant thresholds are reached. nearest Nearest neighbor algorithm. It has following parameters: * radius1: The first radius (X axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius2: The second radius (Y axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius: Set first and second radius (mutually exclusive with radius1 and radius2). Default is 0.0. Added in GDAL 3.6 * angle: Angle of search ellipse rotation in degrees (counter clockwise, default 0.0). * nodata: NODATA marker to fill empty points (default 0.0). linear Linear interpolation algorithm. The Linear method performs linear interpolation by computing a Delaunay triangulation of the point cloud, finding in which triangle of the triangu- lation the point is, and by doing linear interpolation from its barycentric coordinates within the triangle. If the point is not in any triangle, de- pending on the radius, the algorithm will use the value of the nearest point or the nodata value. It has following parameters: * radius: In case the point to be interpolated does not fit into a triangle of the Delaunay triangulation, use that maximum distance to search a nearest neighbour, or use nodata otherwise. If set to -1, the search dis- tance is infinite. If set to 0, nodata value will be always used. De- fault is -1. * nodata: NODATA marker to fill empty points (default 0.0). DATA METRICS Besides the interpolation functionality gdal_grid can be used to compute some data metrics using the specified window and output grid geometry. These metrics are: * minimum: Minimum value found in grid node search ellipse. * maximum: Maximum value found in grid node search ellipse. * range: A difference between the minimum and maximum values found in grid node search ellipse. * count: A number of data points found in grid node search ellipse. * average_distance: An average distance between the grid node (center of the search ellipse) and all of the data points found in grid node search ellipse. * average_distance_pts: An average distance between the data points found in grid node search ellipse. The distance between each pair of points within ellipse is calculated and average of all distances is set as a grid node value. All the metrics have the same set of options: * radius1: The first radius (X axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius2: The second radius (Y axis if rotation angle is 0) of search el- lipse. Set this parameter to zero to use whole point array. Default is 0.0. * radius: Set first and second radius (mutually exclusive with radius1 and radius2). Default is 0.0. Added in GDAL 3.6 * angle: Angle of search ellipse rotation in degrees (counter clockwise, default 0.0). * min_points: Minimum number of data points to use. If less amount of points found the grid node considered empty and will be filled with NO- DATA marker. This is only used if search ellipse is set (both radii are non-zero). Default is 0. * max_points_per_quadrant: Maximum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. When specified, the algorithm will only take into account up to max_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * min_points_per_quadrant: Minimum number of data points to use per quad- rant. Default is 0. Added in GDAL 3.6. If that number is not reached, the point being interpolated will be set with the NODATA marker. When specified, the algorithm will collect at least min_points_per_quadrant points for each of the right-top, left-top, right-bottom and right-top quadrant relative to the point being interpolated. * nodata: NODATA marker to fill empty points (default 0.0). When min_points_per_quadrant or max_points_per_quadrant is specified, the search will start with the closest point to the point being interpolated from the first quadrant, then the closest point to the point being interpo- lated from the second quadrant, etc. up to the 4th quadrant, and will con- tinue with the next closest point in the first quadrant, etc. until max_points and/or max_points_per_quadrant thresholds are reached. READING COMMA SEPARATED VALUES Often you have a text file with a list of comma separated XYZ values to work with (so called CSV file). You can easily use that kind of data source in gdal_grid. All you need is to create a virtual dataset header (VRT) for your CSV file and use it as an input datasource for gdal_grid. You can find details on the VRT format on the VRT -- OGR Virtual Format description page. Here is a small example. Let's say we have a CSV file called dem.csv con- taining Easting,Northing,Elevation 86943.4,891957,139.13 87124.3,892075,135.01 86962.4,892321,182.04 87077.6,891995,135.01 ... For the above data we will create a dem.vrt header with the following con- tent: <OGRVRTDataSource> <OGRVRTLayer name="dem"> <SrcDataSource>dem.csv</SrcDataSource> <GeometryType>wkbPoint</GeometryType> <GeometryField encoding="PointFromColumns" x="Easting" y="Northing" z="Elevation"/> </OGRVRTLayer> </OGRVRTDataSource> This description specifies so called 2.5D geometry with three coordinates X, Y and Z. The Z value will be used for interpolation. Now you can use dem.vrt with all OGR programs (start with ogrinfo to test that every- thing works fine). The datasource will contain a single layer called "dem" filled with point features constructed from values in the CSV file. Using this technique you can handle CSV files with more than three columns, switch columns, etc. OK, now the final step: gdal_grid dem.vrt demv.tif Or, if we do not wish to use a VRT file: gdal_grid -l dem -oo X_POSSIBLE_NAMES=Easting \ -oo Y_POSSIBLE_NAMES=Northing -zfield Elevation dem.csv dem.tif If your CSV file does not contain column headers then it can be handled in the VRT file in the following way: <GeometryField encoding="PointFromColumns" x="field_1" y="field_2" z="field_3"/> The Comma Separated Value (.csv) description page contains details on CSV format supported by GDAL/OGR. CREATING MULTIBAND FILES Creating multiband files is not directly possible with gdal_grid. One might use gdal_grid multiple times to create one band per file, and then use gdalbuildvrt -separate and then gdal_translate: gdal_grid ... 1.tif; gdal_grid ... 2.tif; gdal_grid ... 3.tif gdalbuildvrt -separate 123.vrt 1.tif 2.tif 3.tif gdal_translate 123.vrt 123.tif Or just use gdal_merge, to combine the one-band files into a single one: gdal_grid ... a.tif; gdal_grid ... b.tif; gdal_grid ... c.tif gdal_merge -separate a.tif b.tif c.tif -o d.tif RETURN STATUS CODE The program returns status code 0 in case of success, and non-zero in case of error (non-blocking errors emitted as warnings are considered as a suc- cessful execution). C API This utility is also callable from C with GDALGrid(). EXAMPLES Example 1: Create a raster from a VRT datasource using inverse distance to a power gdal_grid -a invdist:power=2.0:smoothing=1.0 -txe 85000 89000 -tye 894000 890000 \ -outsize 400 400 -of GTiff -ot Float64 -l dem dem.vrt dem.tiff This example creates a raster TIFF file from the VRT datasource described in Reading comma separated values section using the inverse distance to a power method. Values to interpolate will be read from Z value of geometry record. Example 2: Read values to interpolate from an attribute field gdal_grid -zfield "Elevation" -a invdist:power=2.0:smoothing=1.0 -txe 85000 89000 \ -tye 894000 890000 -outsize 400 400 -of GTiff -ot Float64 -l dem dem.vrt \ dem.tiff --config GDAL_NUM_THREADS ALL_CPUS This command does the same thing as the previous one, but reads values to interpolate from the attribute field specified with -zfield option instead of geometry record. So in this case X and Y coordinates are being taken from geometry and Z is being taken from the "Elevation" field. The GDAL_NUM_THREADS is also set to parallelize the computation. AUTHOR Andrey Kiselev <dron@ak4719.spb.edu> COPYRIGHT 1998-2026 Jun 05, 2026 GDAL_GRID(1)
NAME | SYNOPSIS | DESCRIPTION | INTERPOLATION ALGORITHMS | DATA METRICS | READING COMMA SEPARATED VALUES | CREATING MULTIBAND FILES | RETURN STATUS CODE | C API | EXAMPLES | AUTHOR | COPYRIGHT
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