Project

Function Description: Transforms raster data from one coordinate system to another.

Data Description

  • This tool ensures that the projection process maintains an error margin of less than half a pixel.

  • This tool can only output square pixel sizes.

  • The Transformation Options parameter of this tool is optional. It can be left empty if no geographic or datum transformation is needed. However, if a transformation is required, you need to select and configure the seven-parameter transformation to ensure accurate conversion.

    • For example, projecting from GCS_North_American_1983 to NAD_1983_UTM_Zone_12N does not require a geographic transformation because both the input and output coordinate systems use the NAD_1983 datum. However, projecting from GCS_North_American_1983 to WGS_1984_UTM_Zone_12N requires a geographic transformation because the input coordinate system uses the NAD_1983 datum, while the output coordinate system uses the WGS_1984 datum.

    Note: Transformations are bidirectional, meaning that if a transformation is required, different transformation parameters need to be set for transforming from the input projection to the target projection and from the target projection back to the input projection.

  • The default output raster pixel size is determined by the projected pixel size at the center of the output raster. When projecting the boundaries of the input raster, the minimum and maximum extent values will determine the size of the output raster. The value of a pixel is determined by projecting it back into the input coordinate system.

  • The format type of the projected output data will match the format type of the input data.

  • You must first use the Define Projection tool to define the coordinate system for raster data with undefined or "unknown" coordinate systems before using the Project tool on that data; otherwise, the projection will fail.

  • The name of the input raster data is used to name the output raster data. For example, if the input is C:\test\input.tif, the output raster data will be named input.tif. If this name already exists in the output workspace, the system will append a number (e.g., (1)) to ensure the name is unique (input(1).tif).

Steps

  1. Locate the Project tool under Raster Tools in the toolbox, and double-click to open the tool's window.
Picture

Project

Parameter Description:

  • Input Raster: The raster data to be transformed to the new projection.
  • Target Coordinate System: The coordinate system to which the input data will be projected.
  • Conversion Options (Optional): This option is used to transform data between two geographic coordinate systems or datums. It may be required if the input and output coordinate systems have different datums.
  • Output Directory: The directory where the generated raster data will be stored.

results matching ""

    No results matching ""