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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 |
|
Function |
Summary |
|
Imports features from a BNA file into a geographic file |
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