-
Notifications
You must be signed in to change notification settings - Fork 7
/
pyMap.py
132 lines (106 loc) · 4.57 KB
/
pyMap.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
"""
github: https://github.com/brandonxiang/pyMap
license: MIT
"""
import os
import sys
import math
import requests
from PIL import Image
from tqdm import trange
URL = {
"gaode": "http://webrd02.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={x}&y={y}&z={z}",
"gaode.image": "http://webst02.is.autonavi.com/appmaptile?style=6&x={x}&y={y}&z={z}",
"tianditu": "http://t2.tianditu.cn/DataServer?T=vec_w&X={x}&Y={y}&L={z}",
"googlesat": "http://khm0.googleapis.com/kh?v=203&hl=zh-CN&&x={x}&y={y}&z={z}",
"tianditusat":"http://t2.tianditu.cn/DataServer?T=img_w&X={x}&Y={y}&L={z}",
"esrisat":"http://server.arcgisonline.com/arcgis/rest/services/world_imagery/mapserver/tile/{z}/{y}/{x}",
"gaode.road": "http://webst02.is.autonavi.com/appmaptile?x={x}&y={y}&z={z}&lang=zh_cn&size=1&scale=1&style=8"
}
def process_latlng(north, west, south, east, zoom, output='mosaic', maptype="gaode.image"):
"""
download and mosaic by latlng
Keyword arguments:
north -- north latitude
west -- west longitude
south -- south latitude
east -- east longitude
zoom -- map scale (0-18)
output -- output file name default mosaic
"""
left, top = latlng2tilenum(north, west, zoom)
right, bottom = latlng2tilenum(south, east, zoom)
process_tilenum(left, right, top, bottom, zoom, output, maptype)
def process_tilenum(left, right, top, bottom, zoom, output='mosaic', maptype="gaode.image"):
"""
download and mosaic by tile number
Keyword arguments:
left -- left tile number
right -- right tile number
top -- top tile number
bottom -- bottom tile number
zoom -- map scale (0-18)
output -- output file name default mosaic
"""
output = "output/"+output+".png"
download(left, right, top, bottom, zoom, maptype)
_mosaic(left, right, top, bottom, zoom, output, maptype)
def download(left, right, top, bottom, zoom, maptype="gaode.image"):
for x in trange(left, right + 1):
for y in trange(top, bottom + 1):
path = './tiles/%s/%i/%i/%i.png' % (maptype, zoom, x, y)
if not os.path.exists(path):
_download(x, y, zoom, maptype)
def _download(x, y, z, maptype="gaode.image"):
map_url = URL[maptype].format(x=x, y=y, z=z)
r = requests.get(map_url)
path = './tiles/%s/%i/%i' % (maptype, z, x)
if not os.path.isdir(path):
os.makedirs(path)
with open('%s/%i.png' % (path, y), 'wb') as f:
for chunk in r.iter_content(chunk_size=1024):
if chunk:
f.write(chunk)
f.flush()
def _mosaic(left, right, top, bottom, zoom, output='mosaic', maptype="gaode.image"):
size_x = (right - left + 1) * 256
size_y = (bottom - top + 1) * 256
output_im = Image.new("RGBA", (size_x, size_y))
for x in trange(left, right + 1):
for y in trange(top, bottom + 1):
path = './tiles/%s/%i/%i/%i.png' % (maptype, zoom, x, y)
if os.path.exists(path):
target_im = Image.open(path)
if target_im.mode == 'P':
output_im.paste(target_im, (256 * (x - left), 256 * (y - top)))
output_path = os.path.split(output)
if len(output_path) > 1 and len(output_path) != 0:
if not os.path.isdir(output_path[0]):
os.makedirs(output_path[0])
output_im.save(output)
def latlng2tilenum(lat_deg, lng_deg, zoom):
"""
convert latitude, longitude and zoom into tile in x and y axis
referencing http://www.cnblogs.com/Tangf/archive/2012/04/07/2435545.html
Keyword arguments:
lat_deg -- latitude in degree
lng_deg -- longitude in degree
zoom -- map scale (0-18)
Return two parameters as tile numbers in x axis and y axis
"""
n = math.pow(2, int(zoom))
xtile = ((lng_deg + 180) / 360) * n
lat_rad = lat_deg / 180 * math.pi
ytile = (1 - (math.log(math.tan(lat_rad) + 1 / math.cos(lat_rad)) / math.pi)) / 2 * n
return math.floor(xtile), math.floor(ytile)
def test():
# process_latlng(22.4566710000, 113.8899620000, 22.3455760000, 114.2126860000, 13, 'output/houmen.png', "gaode")
_mosaic(215552, 215967, 113763, 113923, 18, "output/hui.png", "gaode.road")
def cml():
if not len(sys.argv) in [7, 8]:
print('input 7 parameter northeast latitude,northeast longitude, southeast latitude, southeast longitude,zoom , output file, map type like gaode')
return
process_latlng(float(sys.argv[1]), float(sys.argv[2]), float(sys.argv[3]), float(sys.argv[4]), int(sys.argv[5]), str(sys.argv[6]), str(sys.argv[7]))
if __name__ == '__main__':
test()
# cml()