def get_export(self, crs='EPSG:4326', scale=10):
'''Export NDVI year compositions as .tif to your local folder.
This method calls geemap.ee_export_image.
Args:
crs (string): Coordinate Reference System of the output tifs. Use EPSG style e.g. "EPSG:4326"; "EPSG:32629"
scale (int): Value for pixel size of your output tifs, default is 10 because default sat is Sentinel 2 NDVI,
with bands 8 and 4 (10 m pix/resolution). In case you choose Landsat yous should change scale to 30.
You can also considerer use this parameter like resample in case you get a size limitation error
when try to download a big area.
Returns:
object(tif): 4 bands ndvi_year.tif per year in your ndvi collection, downloaded at your current working directory
'''
self.imagelist = []
self.get_year_composite()
count = (len(self.imagelist))
print(count)
for n in range(count):
year = self.start_year + n
image = self.imagelist[n]
name = 'ndvi_' + str(year) + '.tif'
filename = os.path.join(os.getcwd(), name)
print('Exporting {}'.format(filename), '\n')
geemap.ee_export_image(image,
filename=filename,
scale=scale,
crs=crs,
region=self.roi,
file_per_band=False)
print('All the images in the ndvi collection have been exported')
def get_export_single(self,
image,
name='mycomposition.tif',
crs='EPSG:4326',
scale=10):
'''Export single composition as .tif to your local folder. So long as we can do really nice
multiseasonal composites, e.g. median seasonal NDVI for whole Africa between 2001 and 2020.
I thought that would be interesting to have the chance to export this composites.
This method calls geemap.ee_export_image.
Args:
crs (string): Coordinate Reference System of the output tifs. Use EPSG style e.g. "EPSG:4326"; "EPSG:32629"
scale (int): Value for pixel size of your output tifs, default is 10 because default sat is Sentinel 2 NDVI,
with bands 8 and 4 (10 m pix/resolution). In case you choose Landsat yous should change scale to 30.
You can also considerer use this parameter like resample in case you get a size limitation error
when try to download a big area.
Returns:
object(tif): 4 bands mycompositon.tif, with max, median or perc_90 for the period you chosen,
downloaded at your current working directory
'''
filename = os.path.join(os.getcwd(), name)
geemap.ee_export_image(image,
filename=filename,
scale=scale,
crs=crs,
region=self.roi,
file_per_band=False)
print('Image have been exported')
def export(layer, name):
out_dir = output_directory
name = name.replace('/', '_')
name = name + '.tif'
filename = os.path.join(out_dir, name)
if clipper == None:
geemap.ee_export_image(layer,
filename=filename,
crs=epsg_code,
scale=output_scale)
else:
geemap.ee_export_image(layer,
filename=filename,
region=clipper,
crs=epsg_code,
scale=output_scale)
def exportpoint(self, szid, eepoint, verbose=False):
"""
"""
eeimagecollectionofstacks = self._getexportimage(eepoint,
verbose=verbose)
#
# exportimage is unbounded. we'll clip it to the region specified when instantiating the GEEExport,
# hoping this will give results consistent with the image tif obtained via exportpointtofile/exportpointtodrive
# (by clipping, its footprint and geometry seem to be updated to our region)
#
# print ("- exportpoint image - footprint", exportimage.get('system:footprint').getInfo()) # None
# print ("- exportpoint image - geometry", exportimage.geometry().getInfo()) # unbound ( [[[-180, -90], [180, -90]...)
# print ("- exportpoint image - 'region'", exportimage.get('region').getInfo()) # our eeregion
# exportimage = exportimage.clip(exportimage.get('region'))
# print ("- clipped image - footprint", exportimage.get('system:footprint').getInfo()) # our eeregion
# print ("- clipped image - geometry", exportimage.geometry().getInfo()) # our eeregion
# print ("- clipped image - 'region'", exportimage.get('region').getInfo()) # our eeregion
eeimagecollectionofstacks = eeimagecollectionofstacks.map(
lambda eeimage: eeimage.clip(eeimage.get('region')))
#
# test/debug purposes
#
if True:
imageslist = eeimagecollectionofstacks.toList(
eeimagecollectionofstacks.size())
for iIdx in range(eeimagecollectionofstacks.size().getInfo()):
exportimage = ee.Image(imageslist.get(iIdx))
geemap.ee_export_image(
exportimage,
filename=
f"C:/Users/HAESEND/tmp/{str(szid) + '_' + str(type(self._geeproduct).__name__) + '_' + geeutils.szISO8601Date(self._eedatefrom) + '_' + geeutils.szISO8601Date(self._eedatetill) + '_' + exportimage.get('band').getInfo() }.tif",
scale=exportimage.projection().nominalScale(
), # this scale only will determine the pixel size of the ***exported*** image
region=exportimage.geometry(),
file_per_band=False)
return eeimagecollectionofstacks
if len(ee.Image(ilist.get(i)).bandNames().getInfo()) <= 0:
print(
"ERROR; No bands found in image index %d... will skip export."
% (i))
else:
filename = "{}/{}/{}/{}.tif".format(OUTPATH, sitename, a_tile, i)
temp_dir = "{}/{}/{}/".format(OUTPATH, sitename, a_tile)
if not os.path.exists(temp_dir):
os.mkdir(temp_dir)
if os.path.exists(filename):
print("Image {} already exists. Skipping...".format(i))
next
else:
tic = time.time()
print("Exporting Image %d" % (i))
geemap.ee_export_image(ee.Image(ilist.get(i)).select('NDRE'),
filename=filename,
scale=20,
region=poly,
file_per_band=False)
toc = time.time()
hours, rem = divmod(toc - tic, 3600)
mins, secs = divmod(rem, 60)
print("Time elapsed: {:0>2}:{:0>2}:{:05.2f}".format(
int(hours), int(mins), secs))
toc1 = time.time()
hrs1, rem1 = divmod(toc1 - tic1, 3600)
mins1, secs1 = divmod(rem1, 60)
print("Total time elapsed: {:0>2}:{:0>2}:{:05.2f}".format(
int(hrs1), int(mins1), secs1))
def exportpointtofile(self, szid, eepoint, szdstpath, verbose=False):
"""
:param szdstpath: destination filename or director name.
in case szdstpath is an existing directory, a default filename will be generated,
otherwise, in case the parent directory of szdstpath is an existing directory, szdstpath will be considered as a base filename,
otherwise an exception is raised
"""
#
# filenames filenames filenames... I hate filenames...
#
szdstpath = os.path.normpath(szdstpath)
if os.path.isdir(szdstpath):
szbasefilename = os.path.join(
szdstpath,
(str(szid) + '_' + str(type(self._geeproduct).__name__) + '_' +
geeutils.szISO8601Date(self._eedatefrom) + '_' +
geeutils.szISO8601Date(self._eedatetill)))
elif os.path.isdir(os.path.dirname(szdstpath)):
szbasefilename = szdstpath
else:
raise ValueError(f"invalid szdstpath ({szdstpath})")
if szbasefilename.lower().endswith(".tif"):
szbasefilename = szbasefilename[:-4]
if verbose:
print(
f"{str(type(self).__name__)}.exportpointtofile: base filename: {szbasefilename}"
)
eeimagecollectionofstacks = self._getexportimage(eepoint,
verbose=verbose)
imageslist = eeimagecollectionofstacks.toList(
eeimagecollectionofstacks.size())
for iIdx in range(eeimagecollectionofstacks.size().getInfo()):
exportimage = ee.Image(imageslist.get(iIdx))
exportband = exportimage.get('band').getInfo()
eeregion = ee.Geometry(exportimage.get('region'))
#
# and Yet Again: Terminal Touching pixels will be exported. Shinking the original roi with 1% of its pixel size... and pray.
# TODO: implement in exportpointtodrive too
#
exportregion = eeregion.buffer(-0.01,
proj=exportimage.projection())
if verbose:
eeregionpixelcount = exportimage.select(0).unmask(
sameFootprint=False).reduceRegion(ee.Reducer.count(),
eeregion)
exportregionpixelcount = exportimage.select(0).unmask(
sameFootprint=False).reduceRegion(ee.Reducer.count(),
exportregion)
print(
f"{str(type(self).__name__)}.exportpointtofile (earliest image band {exportband} in stack):"
)
print(
f"- actual region: {geeutils.szprojectioninfo(eeregion)}")
print(f"- area: {eeregion.area(maxError=0.001).getInfo()}")
print(
f"- covering {eeregionpixelcount.getInfo()} pixels in src image"
)
print(
f"- export region: {geeutils.szprojectioninfo(exportregion)}"
)
print(f"- area: {exportregion.area(maxError=0.001).getInfo()}")
print(
f"- covering {exportregionpixelcount.getInfo()} pixels in src image"
)
#
# exportpointtofile is mainly for debug; works only for few bands ( < 100 ), small files, fast processes
#
szfilename = szbasefilename + "_" + exportband + ".tif"
geemap.ee_export_image(
exportimage,
filename=szfilename,
scale=exportimage.projection().nominalScale(
), # this scale only will determine the pixel size of the ***exported*** image
region=exportregion,
file_per_band=False
) # the ***exported*** region which is just a teeny-tiny bit smaller than it should be.
#
# some nursing due to quirks in ee.Image.getDownloadURL (current versions: ee 0.1.248, gee 0.8.12)
#
try:
import osgeo.gdal
src_ds = osgeo.gdal.Open(szfilename)
dst_ds = src_ds.GetDriver().CreateCopy(szfilename + ".tmp.tif",
src_ds)
#
# restore band descriptions which are mysteriously lost in the ee.Image.getDownloadURL (current versions: ee 0.1.248, gee 0.8.12)
#
lstbandnames = exportimage.bandNames().getInfo()
for iband in range(src_ds.RasterCount):
dst_ds.GetRasterBand(iband + 1).SetDescription(
lstbandnames[iband])
#
# qgis chokes on '-inf' which is default for masked values in Float32 and Float64 images (current versions: ee 0.1.248, gee 0.8.12)
#
datatype = dst_ds.GetRasterBand(1).DataType
if (datatype == osgeo.gdalconst.GDT_Float32) or (
datatype == osgeo.gdalconst.GDT_Float64):
rasterArray = dst_ds.GetRasterBand(iband + 1).ReadAsArray()
rasterArray[rasterArray == -math.inf] = math.nan
dst_ds.GetRasterBand(iband + 1).WriteArray(rasterArray)
dst_ds.GetRasterBand(iband + 1).SetNoDataValue(math.nan)
dst_ds = None
src_ds = None
os.remove(szfilename)
os.rename(szfilename + ".tmp.tif", szfilename)
except Exception as e:
#
# happens all the time e.g. some file is open in qgis
#
print(
f"{str(type(self).__name__)}.exportpointtofile: updating band names FAILED with exception: {str(e)}"
)
pass
#
# debug. export the shape file of the eeregion (and exportregion) too.
#
if verbose: # yes. verbose. yes. if I verbose, I am debugging, ain't I?
geemap.ee_to_shp(
ee.FeatureCollection(
[ee.Feature(eeregion),
ee.Feature(exportregion)]), szfilename[0:-4] + ".shp")
#
#
#
return eeimagecollectionofstacks
'D:\samples',
ee.Image(s2_all_.get(i)).get('PRODUCT_ID').getInfo())
if not os.path.exists(saveFolder_):
os.mkdir(saveFolder_)
else:
continue
#if path.exists(filename):
# continue
s2_mosaic = ee.Image(s2_all_.get(i)).clip(aoi)
filename = os.path.join(saveFolder_, '10GSD.tif')
geemap.ee_export_image(s2_mosaic.select(s2_bands_10),
filename=filename,
scale=10,
region=aoi,
crs=ee.Projection(epsg),
file_per_band=False)
os.remove(filename[:-4] + ".zip")
filename = os.path.join(saveFolder_, '20GSD.tif')
geemap.ee_export_image(s2_mosaic.select(s2_bands_20),
filename=filename,
scale=20,
region=aoi,
crs=ee.Projection(epsg),
file_per_band=False)
os.remove(filename[:-4] + ".zip")
# url = s2_mosaic.getDownloadURL({
# 'name':citySeason,# +'B'+str(i),
def GetBurnedArea(year, feature):
"""
Function to get the burnt area and landuse from GEE. The input is the year you are interested in, and a feature of the AOI.
The output is a dictionary of the burnt area per lancover type and a .tif with the raster data of the burnt area.
"""
#import libraries
import os
import requests
import rasterio
from rasterio.plot import show
from rasterio.features import shapes
import pandas as pd
import geopandas as gpd
import matplotlib
from matplotlib import pyplot as plt
import gdal
import ee
import geemap
#create folders if they are not present
if not os.path.exists('data'): os.makedirs('data')
if not os.path.exists('output'): os.makedirs('output')
#filter GEE data based on year and select landcover.
startdate = str(year) + '-01-01'
enddate = str(year) + '-12-31'
dataset = ee.ImageCollection('ESA/CCI/FireCCI/5_1').filterDate(
str(startdate), str(enddate))
burnedArea = dataset.select('LandCover')
maxBA = burnedArea.max()
#get feature geometry
AOI = feature
roi = AOI.geometry()
#clip feature to GEE raster and save as a .tif
image = maxBA.clip(AOI).unmask()
filenameWGS = 'data/BA_' + str(year) + '.tif'
geemap.ee_export_image(image,
filename=str(filenameWGS),
scale=250,
region=roi,
file_per_band=False)
#reproject to tif to use it in calculations
warp = gdal.Open(str(filenameWGS))
filenameWM = str('data/BA_' + str(year) + 'WM.tif')
b19 = gdal.Warp(filenameWM,
warp,
srcNodata=0,
dstNodata=0,
srcSRS='EPSG:4326',
dstSRS='EPSG:3395')
del b19
#Read raster into an array
b19 = rasterio.open(filenameWM)
array2 = b19.read(1)
#calculate burnt area per landcover type and return a dictionary
flat_list = [item for sublist in array2 for item in sublist]
BurnedArea = dict((x, flat_list.count(x)) for x in set(flat_list))
del BurnedArea[0]
meta = b19.meta
area = meta['transform'][0]**2 / 10000
BurnedArea.update((x, y * area) for x, y in BurnedArea.items())
dicti = {}
Cropland = [10, 20, 30]
Forest = [50, 60, 70, 80, 90, 100, 110, 170]
Shrubland = [120, 180, 40]
Grassland = [130, 150, 140]
area = 0.0
for k in Cropland:
try:
area += BurnedArea[k]
except KeyError:
continue
dicti["Cropland"] = area
area = 0.0
for k in Forest:
try:
area += BurnedArea[k]
except KeyError:
continue
dicti["Forest"] = area
area = 0.0
for k in Shrubland:
try:
area += BurnedArea[k]
except KeyError:
continue
dicti["Shrubland"] = area
area = 0.0
for k in Grassland:
try:
area += BurnedArea[k]
except KeyError:
continue
dicti["Grassland"] = area
return (dicti)
s2_masked = exportCloudFreeSen2(aoi, start_date, end_date)
s2_masked = s2_masked.select(s2_bands)
if m < 10:
filename = os.path.join(
saveFolder_, feature['properties']['title'] + '_' +
str(year) + '_0' + str(m) + '.tif')
else:
filename = os.path.join(
saveFolder_, feature['properties']['title'] + '_' +
str(year) + '_' + str(m) + '.tif')
geemap.ee_export_image(s2_masked,
filename=filename,
scale=10,
region=aoi,
crs=ee.Projection(epsg),
file_per_band=False)
os.remove(filename[:-4] + ".zip")
start_date = ee.Date.fromYMD(year, 12, 1)
end_date = ee.Date.fromYMD(year + 1, 1, 1)
#s2 = ee.ImageCollection('COPERNICUS/S2') \
# .filterDate(start_date, end_date).select(s2_bands) \
# .filterBounds(aoi).median().clip(aoi)
s2_masked = exportCloudFreeSen2(aoi, start_date, end_date)
s2_masked = s2_masked.select(s2_bands)
