GetBNAInfo()

Collects summary information on the contents of a BNA file.

bna_info = GetBNAInfo(string bna_file_name)

Argument	Contents
bna_file_name	The path and file name of the BNA file

An array of information as follows:

Element	Type	Contents
1	Array	An array of four real numbers indicating the bounding coordinates of the file: {x_min, y_min, x_max, y_max}
2	Array	An array of entity type-count pairs indicating the quantity of each type of entity in the file
3	String	"True" if the BNA file appears to be tab-delimited, "False" otherwise; this information is not guaranteed to be correct
4	Integer	A best guess of the number of number of name fields for each entity
5	String	The first layer name appearing in the BNA file, or null if no layer name is used

The entity type-count list includes one entry for each of the following types: POINT, LINE, CIRCLE, REGION.
The tab-delimited flag is required by ImportBNA().
The number of name fields is always between one and four, and is an input to ImportBNA().

// This call...

bna_info = GetBNAInfo("c:\\atlasgis.bna")

// Returns this type of information...

// bna_info = {

// {-85.52, 37.45, -83.37, 39.632}, (bounding rect)

// {{"POINT", 231}, {"REGION", 100}, ...} (counts by entity type)

// "False", (tab-delimited)

// 3, (name fields/entity)

// "State Boundaries"} (layer name)

Error Type	Meaning
Error	The file is not a valid BNA file
NotFound	There is no BNA file with the given path and file name