Conditional Math geoprocessing functions

Image Analyst ライセンスで利用できます。

Spatial Analyst のライセンスで利用可能。

The Conditional geoprocessing functions allow you to control the output values based on the conditions placed on the input raster values. The conditions that can be applied are of two types, those being either queries on the attributes or a condition based on the position of the conditional statement in a list.

The attribute query geoprocessing functions explicitly identify all cells that are evaluated as True. These cells can retain their original value, be set to another value, or be set to NoData. The cells that are evaluated as False can be set to a set of values different from the True condition. For example, if the value in the input raster is greater than 10, return 1; otherwise, return 100.

• The Con and Set Null geoprocessing functions can use a where clause as a logical expression to define the attribute query.

The positional condition requires an input parameter (either a raster or constant) specifying the position of the conditional statement (either a raster or constant) that should be used for the output. For example, if the value for a specified cell of the input raster is 1, return the value specified by the first input in the list; if a cell in the input raster is 2, return the value specified by the second raster in the list, and so on.

• The Pick geoprocessing function allows you to specify a list of inputs from which to provide the output value, based on the value of the position input.

Geoprocessing function	Description
Con	入力ラスターのそれぞれの入力セルに対して if/else 条件の評価を実行します。
Pick	ポジション ラスターの値を使用して、入力ラスターのリストの中で出力セル値になるラスターを決定します。
Set Null	Set Null は、指定した条件に基づいて指定のセル位置を NoData に設定します。 条件評価が True の場合は NoData、False の場合は別のラスターで指定した値を返します。