getImageCoordinates.py 文件源码

def __init__(self,xpixel,ypixel,library,zoomLevel):
        self.xpixel=xpixel
        self.ypixel=ypixel
        #load csv data. Rows are zoom levels, column are latitude
        #and values are meters per pixel
        with open(library,'rb') as csvfile:
            metersperpixel = list(csv.reader(csvfile,delimiter=","))
        latitudes=[]
        #convert to floats
        for element in metersperpixel[0][1:]:
            latitudes.append(float(element))
        for row in range(1,len(metersperpixel)):
            res_values=[]
            if int(metersperpixel[row][0])==zoomLevel:
            #convert to floats
                for element in metersperpixel[row][1:]:
                    res_values.append(float(element))
                self.fitvalues=\
                    numpy.polyfit(latitudes, #fit to latitutde values
                    res_values, 3)  #3rd degree polynomial fit
                print "Fit done."   
                break