Set resample pixel sizes

Instructions for use

Pixel is the most basic information unit of Grid/Image data. The coordinate position of the pixel is determined by the row number and column number. Each pixel has an attribute value, which represents the information of the corresponding position of the pixel. For example, the dem grid pixel reflects the elevation information of the corresponding ground of the pixel. Pixel size, also known as spatial resolution, refers to the size of the ground area corresponding to a single pixel.

For a Grid/Image data with a fixed spatial division ratio, the pixel size can be changed by resampling.

The text box to the right of Pixels in the Grid/Image Parameters group sets the resampled pixel size.

Operation steps

  1. On the Registration tab, in the Grid/Image Parameters group, enter the resampled pixel size in the text box to the right of the Pixel label. The unit of the pixel size is the same as the unit of the Projected Coordinate System of the Registration Layer to be registered.
  2. Operate on the grid/Image DatasetPerform registration and view the saved registration Result DatasetAttributes. It can be seen that the X resolution and Y resolution values of the grid/Image Dataset have changed.

    3. Let's take Bilinear as an example and resample a grid with a pixel size of 0. 00027 in that Geographic Coordinate System. The pixel size after resampling is 0.013. The picture below is the effect picture after registration.

    Before resampling After resampling

Precautions

  1. The unit of the pixel size corresponds to the unit of the Projected Coordinate System. If the coordinate system of the Registration Layer is a Projected Coordinate System in meters, kilometers, feet, etc., and if the coordinate system of the Registration Layer is a Geographic Coordinate System, The units are degrees, minutes, and seconds.
  2. Select the appropriate pixel size to resample the Grid/Image data. If the pixel value is too large, it will cause the loss of information; if the pixel value is too small, it can not achieve the purpose of resampling.