FAPAR to KML!

This commit is contained in:
Inex Code 2021-12-17 22:32:04 +03:00
parent b92c7be4dc
commit 7d7d68ad67
3 changed files with 14458 additions and 0 deletions

14404
fapar.kml Normal file

File diff suppressed because it is too large Load Diff

40
sat.py
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@ -3,6 +3,7 @@ import requests
from sat7_pointer import *
import numpy as np
from tqdm import tqdm
from lxml import etree
# Load Landsat 7 band 1, 2, 3 TIF images and create a composite image
# from the three bands.
@ -277,3 +278,42 @@ for x in tqdm(range(result.size[0]), desc="FAPAR"):
result.putpixel((x, y), get_color_fapar(FAPAR, rho_i))
result.save('fapar.png')
root = etree.Element("kml")
doc = etree.SubElement(root, "Document")
start_x = 550
start_y = 900
width = 30
height = 30
result = result.crop((start_x, start_y, start_x+width, start_y+height))
for x in tqdm(range(result.size[0]), desc="KML"):
for y in range(result.size[1]):
color = result.getpixel((x, y))
if color == (0, 0, 0):
continue
coord = pixel_to_lat_lot(x+x0+start_x, y+y0+start_y, mtl_data)
neighbour_r = pixel_to_lat_lot(x+1+x0+start_x, y+y0+start_y, mtl_data)
neighbour_d = pixel_to_lat_lot(x+x0+start_x, y+1+y0+start_y, mtl_data)
neighbour_rd = pixel_to_lat_lot(x+1+x0+start_x, y+1+y0+start_y, mtl_data)
placemark = etree.SubElement(doc, "Placemark")
etree.SubElement(placemark, "name").text = f"{x}_{y}"
etree.SubElement(placemark, "styleUrl").text = f"#style_{x}_{y}"
polygon = etree.SubElement(placemark, "Polygon")
outer = etree.SubElement(polygon, "outerBoundaryIs")
linearring = etree.SubElement(outer, "LinearRing")
coordinates = etree.SubElement(linearring, "coordinates")
coordinates.text = f"{coord[0]},{coord[1]},0 {neighbour_r[0]},{neighbour_r[1]},0 {neighbour_rd[0]},{neighbour_rd[1]},0 {neighbour_d[0]},{neighbour_d[1]},0 {coord[0]},{coord[1]},0"
color = result.getpixel((x, y))
color = (color[2], color[1], color[0])
color = '%02x%02x%02x' % color
color = "64" + color
style = etree.SubElement(doc, "Style")
style.set("id", f"style_{x}_{y}")
polystyle = etree.SubElement(style, "PolyStyle")
etree.SubElement(polystyle, "color").text = color
with open("fapar.kml", "wb") as f:
f.write(etree.tostring(root, pretty_print=True))

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@ -51,6 +51,20 @@ def load_metadata(mtl_file):
return mtl_data
def pixel_to_lat_lot(x, y, mtl_data):
k = (x - 0.5) / mtl_data['width']
r = (y - 0.5) / mtl_data['height']
y = k*(mtl_data['vector_a'] + mtl_data['mu'] * (mtl_data['vector_a'] - mtl_data['vector_s'])) \
+ r * (mtl_data['vector_c'] + mtl_data['nu'] * (mtl_data['vector_c'] - mtl_data['vector_s']))
B = np.array([mtl_data['vector_a'], mtl_data['vector_c'], mtl_data['vector_s']-y]).T
ags = np.linalg.solve(B, y.T)
al = ags[0]
gm = ags[1]
ecef = mtl_data['ecef_corners'][0, :] + al*mtl_data['vector_a'] + gm*mtl_data['vector_c']
lat, lon, alt = pyproj.transform(mtl_data['ecef'], mtl_data['lla'], ecef[0], ecef[1], ecef[2], radians=False)
return [lat, lon]
def lat_lot_to_pixel(lat, lon, mtl_data):
target_vector = np.array([lat, lon, 0])