Download Mapillary images a JPGs

mapillary_jpg_download.py

import mercantile, mapbox_vector_tile, requests, json, os
from vt2geojson.tools import vt_bytes_to_geojson
    
# define an empty geojson as output
output= { "type": "FeatureCollection", "features": [] }

# vector tile endpoints -- change this in the API request to reference the correct endpoint
tile_coverage = 'mly1_public'

# tile layer depends which vector tile endpoints: 
# 1. if map features or traffic signs, it will be "point" always
# 2. if looking for coverage, it will be "image" for points, "sequence" for lines, or "overview" for far zoom
tile_layer = "image"

# Mapillary access token -- user should provide their own
access_token = 'MLY|XXX'

# a bounding box in [east_lng,_south_lat,west_lng,north_lat] format
west, south, east, north = [-80.13423442840576,25.77376933762778,-80.1264238357544,25.788608487732198]

# get the list of tiles with x and y coordinates which intersect our bounding box
# MUST be at zoom level 14 where the data is available, other zooms currently not supported
tiles = list(mercantile.tiles(west, south, east, north, 14))

# loop through list of tiles to get tile z/x/y to plug in to Mapillary endpoints and make request
for tile in tiles:
    tile_url = 'https://tiles.mapillary.com/maps/vtp/{}/2/{}/{}/{}?access_token={}'.format(tile_coverage,tile.z,tile.x,tile.y,access_token)
    response = requests.get(tile_url)
    data = vt_bytes_to_geojson(response.content, tile.x, tile.y, tile.z,layer=tile_layer)

    # push to output geojson object if yes
    for feature in data['features']:
        
        # get lng,lat of each feature
        lng = feature['geometry']['coordinates'][0]
        lat = feature['geometry']['coordinates'][1]
        
        # ensure feature falls inside bounding box since tiles can extend beyond
        if lng > west and lng < east and lat > south and lat < north:

            # create a folder for each unique sequence ID to group images by sequence
            sequence_id = feature['properties']['sequence_id']
            if not os.path.exists(sequence_id):
                os.makedirs(sequence_id)

            # request the URL of each image
            image_id = feature['properties']['id']
            header = {'Authorization' : 'OAuth {}'.format(access_token)}
            url = 'https://graph.mapillary.com/{}?fields=thumb_2048_url'.format(image_id)
            r = requests.get(url, headers=header)
            data = r.json()
            image_url = data['thumb_2048_url']

            # save each image with ID as filename to directory by sequence ID
            with open('{}/{}.jpg'.format(sequence_id, image_id), 'wb') as handler:
                image_data = requests.get(image_url, stream=True).content
                handler.write(image_data)

            

Well done!

@cbeddow Are you able to download and view the point cloud supplied as sfm_cluster, among the "fields" associated with an individual image ?

I wanted to download all images from one City. Therefor i got my boundingbox data and Started a server. I used this script, to download the pictures ordered by sequence via API :) so far everything was working.

Now i have a problem: My server (which i got from university) has got a timelimit and it stopped and crashed after 4 hours of downloading. Also i can see the last Picture downloaded and the sequence it was in (by timestamp). My question: is there a posibility to restart the Server and modify the script, so that i just start with the image i dowwnloaded last? anf if Yes: how could i modify that? Would be a big help, if someone knows a workaround on that issue, i think serverchrashes are common and i am sure there will be other people having the same problems!
Greetings and thanks!