IsLayer()

Summary

Determines whether a layer is any of the given types.

Changes

New layer types added in Version 5.0.

Syntax

answer = IsLayer(string layer_name, array types)

Argument	Contents
layer_name	The name of the layer to be tested
types	An array of strings with one or more layer types as shown below

Type	Meaning
DBD Point	A point layer from a standard geographic file; includes DBD Node
DBD Node	A node layer from a standard geographic file
DBD Line	A line layer from a standard geographic file
DBD Area	An area layer from a standard geographic file
DBD	Any type of layer from a standard geographic file
CDF Point	A point layer from a compact geographic file; includes CDF Node and CDF Grid
CDF Node	A node layer from a compact geographic file
CDF Grid	A grid layer from a compact geographic file
CDF Line	A line layer from a compact geographic file
CDF Street	A street layer from a compact geographic file
CDF Area	An area layer from a compact geographic file
CDF	Any type of layer from a compact geographic file
SDO Point	A point layer from an Oracle Spatial table
SDO Line	A line layer from an Oracle Spatial table
SDO Area	An area layer from an Oracle Spatial table
SDO	Any type of layer from an Oracle Spatial table
SHAPE Point	A point layer from a Shapefile layer
SHAPE Line	A line layer from a Shapefile layer
SHAPE Area	An area layer from a Shapefile layer
SHAPE	Any type of layer from a Shapefile layer
MITAB Point	A point layer from a MapInfo TAB file layer
MITAB Line	A line layer from a MapInfo TAB file layer
MITAB Area	An area layer from a MapInfo TAB file layer
MITAB	Any type of layer from a MapInfo TAB file layer
Geodatabase Point	A point layer from an Esri Geodatabase layer
Geodatabase Line	A line layer from an Esri Geodatabase layer
Geodatabase Area	An area layer from an Esri Geodatabase layer
Geodatabase	Any type of layer from an Esri Geodatabase layer
ODBC Point	A point layer from an ODBC table
ODBC	Any type of layer from an ODBC table; currently includes only ODBC Point
External	Any type of layer from an external (non-Caliper) format, including those from an Oracle Spatial table, Shapefile layer, MapInfo TAB file layer, Esri Geodatabase layer, or ODBC table
Geo Point	A point layer from either a standard or compact geographic file, or an SDO Point, SHAPE Point, MITAB Point, GeoDatabase Point, ODBC Point, or Traffic Point; includes DBD Node, CDF Node, and CDF Grid
Geo Node	A node layer from either a standard or compact geographic file
Geo Grid	Any type of grid layer; currently includes only CDF Grid
Geo Line	A line layer from either a standard or compact geographic file, or an SDO Line, SHAPE Line, MITAB Line, GeoDatabase Line, or Traffic Line
Geo Area	A area layer from either a standard or compact geographic file, or an SDO Area, SHAPE Area, MITAB Area, or GeoDatabase Area
Point	Any type of point layer
Line	Any type of line layer
Area	Any type of area layer
Geographic	Any type of point, line, or area layer
Image	A raster image layer
Image Library	A library of raster images

Returns

An integer value of 1 (True) if the layer is of one of the designated types, or 0 (False) otherwise.

Notes

A node layer is a point layer in which the points are endpoints for a line layer in a geographic file (e.g., intersections).
IsLayer() can be used to test for several layer types at once.

Example

if IsLayer(GetLayer(), {"Point", "Area"}) then

SetIconColor(null, blue)

else

SetFillColor(null, blue)

Error Codes

Error Type	Meaning
NotFound	There is no layer with the given name
Error	One of the entries in the types array is invalid

Function	Summary
GetLayer()	Gets the name of the current layer, if any
GetLayerType()	Gets the type of a layer