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发表于 2016-9-13 10:07:53
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本帖最后由 gjj123 于 2016-9-13 10:12 编辑
主要是想实现读取文本文件,文件格式如下,包含精度,纬度,和值
#Set data folders
# coding=utf-8
basedir = 'C:/Users/jingjing_gu/Desktop/MeteoInfo_Java_1.3.4R3_Files/MeteoInfo'
datadir = os.path.join(basedir, 'sample/MICAPS')
mapdir = os.path.join(basedir, 'map')
#Read shape files
bou2_layer = shaperead(os.path.join(mapdir, 'bou2_4p.shp'))
bou1_layer = shaperead(os.path.join(mapdir, 'bou1_4l.shp'))
china_layer = shaperead(os.path.join(mapdir, 'china.shp'))
city_layer = shaperead(os.path.join(mapdir, 'res1_4m.shp'))
#Read station data
fn = 'E:/Temp/txt.dat'
ncol = numasciicol(fn)
nrow = numasciirow(fn)
a = asciiread(fn,shape=(nrow,ncol))
lon = a[:,0]
lat = a[:,1]
v = a[:,2]
axesm()
#griddata function - interpolate
x = arange(75, 135, 0.5)
y = arange(18, 55, 0.5)
prg = griddata((lon, lat), v, xi=(x, y), method='idw', convexhull=True)[0]
#Plot
axesm()
geoshow(bou2_layer, edgecolor='lightgray')
geoshow(bou1_layer, facecolor=(0,0,255))
geoshow(city_layer, facecolor='r', size=4, labelfield='NAME', fontname=u'楷体', fontsize=16, yoffset=15)
geoshow(china_layer, visible=False)
levs = [0.1, 1, 2, 5, 10, 20, 25, 50, 100]
cols = [(255,255,255),(170,240,255),(120,230,240),(200,220,50),(240,220,20),(255,120,10),(255,90,10), \
(240,40,0),(180,10,0),(120,10,0)]
layer = contourfm(prg, levs, colors=cols)
masklayer(china_layer, [layer])
colorbar(layer)
xlim(72, 136)
ylim(16, 55)
text(95, 52, u'全国PM2.5实况图', fontname=u'黑体', fontsize=16)
text(95, 50, u'(2010-10-14 08:00 至 2010-10-14 14:00)', fontname=u'黑体', fontsize=14)
#Add south China Sea
sc_layer = bou1_layer.clone()
axesm(position=[0.14,0.18,0.15,0.2], axison=False)
geoshow(sc_layer, facecolor=(0,0,255))
xlim(106, 123)
ylim(2, 23)
savefig("E:/Temp/ABC.BMP")
可是出来的结果不对,显示的点数并不是我txt.bat中所设的点 |
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