我正在尝试使用 GDAL 和 Python 将 ENVI 文件作为数组读取
图片信息如下:
Driver: ENVI/ENVI .hdr Labelled
Files: IMG-VV-ALPSRP248213250-P1.1__D_pwr_geo_sigma
IMG-VV-ALPSRP248213250-P1.1__D_pwr_geo_sigma.hdr
Size is 1659, 2775
Coordinate System is:
PROJCS["UTM Zone 16, Northern Hemisphere",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9108"]],
AUTHORITY["EPSG","4326"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",-87],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["Meter",1]]
Origin = (332125.000000000000000,2017650.000000000000000)
Pixel Size = (25.000000000000000,-25.000000000000000)
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 332125.000, 2017650.000) ( 88d35'16.06"W, 18d14'29.96"N)
Lower Left ( 332125.000, 1948275.000) ( 88d34'55.98"W, 17d36'53.41"N)
Upper Right ( 373600.000, 2017650.000) ( 88d11'44.12"W, 18d14'40.22"N)
Lower Right ( 373600.000, 1948275.000) ( 88d11'29.00"W, 17d37' 3.30"N)
Center ( 352862.500, 1982962.500) ( 88d23'21.23"W, 17d55'47.10"N)
Band 1 Block=1659x1 Type=Float32, ColorInterp=Undefined
我的代码如下:
driver = gdal.GetDriverByName('ENVI')
driver.Register()
#Mind the suffix (It is an ENVI file)
file = 'C:/img.1__A_pwr_geo_sigma
raster = gdal.Open(file,gdal.GA_ReadOnly)
raster_array = raster.ReadAsArray()
print raster_array
输出:
>>>array([[ nan, nan, nan, ..., nan, nan, nan],
[ nan, nan, nan, ..., nan, nan, nan],
[ nan, nan, nan, ..., nan, nan, nan],
...,
[ nan, nan, nan, ..., nan, nan, nan],
[ nan, nan, nan, ..., nan, nan, nan],
[ nan, nan, nan, ..., nan, nan, nan]], dtype=float32)
数组中的所有值都是 NaN 虽然我知道图像中有浮点 32 位值(使用 ENVI 软件检查)
我在这里做错了什么?还是后缀有问题?
我还尝试使用 gdal_translate 将 ENVI 格式转换为 Geotiff,但 GeoTiff 也会生成相同的数组。