-
Notifications
You must be signed in to change notification settings - Fork 5
/
convert-to-geojson.py
76 lines (58 loc) · 2.42 KB
/
convert-to-geojson.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
# Convert an export of raw Human data on iOS (Profile / Settings / Export data) to geoJSON
# Use this data export for examople to create your own map in Mapbox Studio
import csv
import os
import math
# Directory that has all Human CSV exported files
path = 'activities/csv/'
def distance(lat1, lng1, lat2, lng2):
# return estimated distance in meters
radius = 6371 * 1000
dLat = (lat2-lat1) * math.pi / 180
dLng = (lng2-lng1) * math.pi / 180
lat1 = lat1 * math.pi / 180
lat2 = lat2 * math.pi / 180
val = math.sin(dLat/2) * math.sin(dLat/2) + math.sin(dLng/2) * math.sin(dLng/2) * math.cos(lat1) * math.cos(lat2)
ang = 2 * math.atan2(math.sqrt(val), math.sqrt(1-val))
return radius * ang
# output head
output = '''{ "type" : "FeatureCollection", "features" : [
'''
# geoJSON feature template
template = '''\
{ "type" : "Feature", "geometry" : { "type" : "LineString", "coordinates" : %s}, "properties" : { "mode" : "%s", "speed" : "%s", "date" : "%s"}}
'''
for root, dirs_list, files_list in os.walk(path):
for file_name in files_list:
# only csv files
if os.path.splitext(file_name)[-1] == '.csv':
file_name_path = os.path.join(root, file_name)
# Read in raw data from csv
rawData = csv.reader(open(file_name_path, 'rb'))
# Skip the first line
next(rawData, None)
coordinates = []
for row in rawData:
# Only lines if previous location is < 300m
if len(coordinates) > 0:
meters = distance(float(row[2]), float(row[3]), coordinates[-1][1], coordinates[-1][0])
print meters
if meters < 300:
coordinates.append([float(row[3]), float(row[2])])
else:
coordinates.append([float(row[3]), float(row[2])])
# a line needs at least two points
if len(coordinates) > 1:
output += template % (coordinates, row[1], row[4], row[0])
# add comma
output += ","
print coordinates
print file_name_path # This is the full path of the filter file
# remove last comma
output = output[0:-1]
# add tail for geojson file
output += ''']}'''
# opens an geoJSON file to write the output to
outFileHandle = open("output.geojson", "w")
outFileHandle.write(output)
outFileHandle.close()