ogrinfo-显示空间数据的相关信息

ogrinfo [-ro] [-q] [-where restricted_where]
[-spat xmin ymin xmax ymax] [-fid fid]
[-sql statement] [-al] [-so] [--formats]
datasource_name [layer [layer ...]]

ogrinfo可将其支持的数据源的各种信息显示到stdout（终端）
-ro: 以只读模式打开
-al: 显示所有层的所有所有元素（参数中不用给出层名）
-so: Summary Only，不显示元素列表，只显示摘要信息，如投影，模式，元素数目和范围
-q: 不显示详细信息，如坐标系统，层模式，元素数目和范围
-where restricted_where: 查询条件
-sql statement: sql查询，"SELECT ... FROM ..."，不支持别名
-spat xmin ymin xmax ymax: 仅显示给定范围内的元素
-fid fid: 仅显示指定feature id的feature
--formats: 显示所支持的格式
datasource_name: 数据源名称
layer: 一个或多个需要显示的层名

如果没有给出层名，则会显示可用层的列表及其几何类型，如果指定了层名，则显示它他们的范围，坐标系统，元素数目，几何类型模式以及所有符合查询条件的元素，如果未指定查询条件，则显示所有元素。
显示的几何类型为OGC WKT格式。
Example：

C:\ms4w\Apache\htdocs\workshop\data>[color=darkred]ogrinfo airports.shp[/color]
INFO: Open of `airports.shp'
using driver `ESRI Shapefile' successful.
1: airports (Point)

C:\ms4w\Apache\htdocs\workshop\data>[color=darkred]ogrinfo -ro -sql "select name,elevation from airports" -where "ELEVATION=1351.0000" airports.shp[/color]
INFO: Open of `airports.shp'
using driver `ESRI Shapefile' successful.

Layer name: airports
Geometry: Point
Feature Count: 1
Extent: (434634.000000, 5228719.000000) - (496393.000000, 5291930.000000)
Layer SRS WKT:
(unknown)
name: String (64.0)
elevation: Real (12.4)
OGRFeature(airports):11
name (String) = Snells Seaplane Base
elevation (Real) = 1351.0000
POINT (444049 5277360)

C:\ms4w\Apache\htdocs\workshop\data>[color=darkred]ogrinfo --formats[/color]
Supported Formats:
-> "ESRI Shapefile" (read/write)
-> "MapInfo File" (read/write)
-> "UK .NTF" (readonly)
-> "SDTS" (readonly)
-> "TIGER" (read/write)
-> "S57" (read/write)
-> "DGN" (read/write)
-> "VRT" (readonly)
-> "AVCBin" (readonly)
-> "REC" (readonly)
-> "Memory" (read/write)
-> "CSV" (read/write)
-> "GML" (read/write)
-> "KML" (read/write)
-> "SQLite" (read/write)
-> "ODBC" (read/write)
-> "PGeo" (readonly)
-> "PostgreSQL" (read/write)
-> "MySQL" (read/write)