Set up the Analysis Environment

During Raster Analysis, the Environment Settings of Raster Analysis shall be clarified to obtain the expected analysis effect. The results of Raster Analysis are somewhat affected by the settings of the Analysis Environment.

Analysis Environment includes Geographic Range, Effective Analysis Area and Default Cell Size of Result Dataset.

At present, Vector-Raster Conversion, Distance Raster Analysis, Interpolation Analysis, Raster Algebraic Operation, Analysis functions such as Line-of-sight Analysis and grid profiling (e.g. Raster Reclassifying, resampling, etc.) require the Analysis Environment to be set.

The Parameter Description of Analysis Environment is as follows:

  • Result Bounds The Geographic Range of

    Result Data is actually a rectangle, which is determined by the coordinate values of the upper, lower, left, and right corner points. The default scope is the intersection of the participating Datasets.

    When you need to narrow or enlarge the analysis Result Data range, you need to set Result Bounds in the Analysis Environment.

    There are four ways to set Result Bounds in the

    Analysis Environment:

    • Custom Bounds: You can enter the left, bottom, right, and top Bounds Info by yourself, or quickly Custom Bounds through the copy and paste buttons on the right.
    • Intersection of All Datasets: The program will automatically identify the intersection of all involved Dataset Bounds as the Geographic Range of Result Data.
    • Union of All Datasets: The program will automatically identify the union of all involved Dataset Bounds as the Geographic Range of Result Data.
    • Use Specified Dataset Bounds: The program will automatically recognize the range of the selected Dataset as the Geographic Range of Result Data.

  • Effective Analysis Area

    When only the operation result of one vector plane Dataset Bounds needs to be output, the Effective Analysis Area supports the selection of the vector Region Dataset as the range of the raster operation Output Result. For example, if DEM Data is National Area data and Calculate Result only needs to output the data of a certain province, the vector Region Dataset of a certain province can be used as the Effective Analysis Area. The Output Result range is only the range of a province.

    • Datasource: Set the Datasource where the Effective Analysis AreaVector Dataset is located.
    • Dataset: Set the Effective Analysis AreaVector Dataset.

  • Default Cell Size

    The output resolution is the resolution at which a new raster (or image) Dataset is generated.

    The output resolution or pixel size

    of Raster Analysis results can be set to any size resolution. The default output resolution size is the maximum resolution of the Dataset of Raster Analysis.

    The settings

    provided are as follows:

    • Max Resolution of All Datasets: Select the resolution with the largest resolution from the All Data set as the resolution to be used for output.
    • Min Resolution of All Datasets: Select the smallest resolution from the All Data set as the resolution to be used for output.
    • Use Specified Dataset Resolution: Specifies the resolution of a referenced Dataset as the Default Cell Size.
    • Custom Resolution: Select Custom Resolution: to activate the Resolution text box and enter the user-specified resolution as the Default Cell Size.

  • Reset

    The Reset button is used to cancel the customized geographic Layer Bounds and output Resolution. After clicking the Reset button, the Result Bounds and Default Cell Size will be set to Default.

  • Set global variables

    Environment parameter Set As Global is

    supported, that is, the parameter value set here is used as the total Raster Environment Analyst environment parameter. Other functions that support environment Parameter Settings are not required to be set repeatedly.