I wrote a small JavaScript application using the Q.js library, which works fine in Chrome, but not in Firefox. I get the following error:
Error: Script terminated by timeout at:
Promise.prototype.then@https://rawgit.com/kriskowal/q/v1/q.js:832:1
when@https://rawgit.com/kriskowal/q/v1/q.js:939:12
continuer@https://rawgit.com/kriskowal/q/v1/q.js:1299:24
_fulfilled@https://rawgit.com/kriskowal/q/v1/q.js:834:54
Promise.prototype.then/https://rawgit.com/kriskowal/q/v1/q.js:863:30
Promise/promise.promiseDispatch@https://rawgit.com/kriskowal/q/v1/q.js:796:13
Promise.prototype.then/<@https://rawgit.com/kriskowal/q/v1/q.js:857:1
runSingle@https://rawgit.com/kriskowal/q/v1/q.js:137:13
flush@https://rawgit.com/kriskowal/q/v1/q.js:125:13
I am not sure if I use the library correctly. In particular, the documentation says that the Q.async() function is experimental. Is there another library you recommend for using asynchronous promises?
The code is on GitHub and can be tested here:
Just click on a river and the corresponding watershed should be drawn.
EDIT: here is the relevant CoffeeScript code.
L.mapbox.accessToken = 'pk.eyJ1IjoiZGF2aWRicm9jaGFydCIsImEiOiJ6eU40bEVvIn0.xnMppw5d4NoZK_11lA-lGw'
map = L.mapbox.map('map', 'examples.map-2k9d7u0c').setView([-10, -60], 5)
pix_deg = 0.0083333333333
pix_deg2 = (pix_deg + pix_deg * 1e-5) / 2
tiles = 0
x_deg = 0
y_deg = 0
x = 0
y = 0
outlet = 0
neighbors_memsize = 1024
neighbors_i = 0
neighbors = new Uint8Array(neighbors_memsize)
tile_width = 1200
url = 0
polygons = 0
polyLayers = 0
pix_i = 0
pack_size = 100
wait = (ms) ->
deferred = Q.defer()
setTimeout( ->
deferred.resolve()
, ms)
return deferred.promise
addPixel = ->
polygons[pix_i % pack_size] = turf.polygon([[
[x_deg - pix_deg2, y_deg - pix_deg2],
[x_deg - pix_deg2, y_deg + pix_deg2],
[x_deg + pix_deg2, y_deg + pix_deg2],
[x_deg + pix_deg2, y_deg - pix_deg2],
[x_deg - pix_deg2, y_deg - pix_deg2]
]])
done_packing = false
pix_i += 1
i = pix_i
level = 1
while !done_packing
if i % pack_size == 0
polygons[level * pack_size + (i / pack_size - 1) % pack_size] = turf.merge(turf.featurecollection(polygons[(level * pack_size - pack_size)..(level * pack_size - 1)]))
polygons[level * pack_size + (i / pack_size - 1) % pack_size].properties = {
"fill": "#6BC65F",
"stroke": "#6BC65F",
"stroke-width": 1
}
polyLayers[level * pack_size + (i / pack_size - 1) % pack_size - pack_size] = L.mapbox.featureLayer(polygons[level * pack_size + (i / pack_size - 1) % pack_size]).addTo(map)
#console.log 'Added polygon at ' + (level * pack_size + (i / pack_size - 1) % pack_size - pack_size) + ', level = ' + level
for k in [(level * pack_size - pack_size)..(level * pack_size - 1)]
polygons[k] = 0
if level > 1
if polyLayers[k - pack_size]?
#console.log 'Removed polygon at ' + (k - pack_size) + ', level = ' + level
map.removeLayer(polyLayers[k - pack_size])
i /= pack_size
level += 1
else
done_packing = true
getTile = (url) ->
console.log 'Downloading ' + url
deferred = Q.defer()
req = new XMLHttpRequest()
req.open 'GET', url, true
req.responseType = 'arraybuffer'
req.onload = ->
arrayBuffer = req.response
if arrayBuffer
console.log 'Done!'
deferred.resolve(new Uint8Array(arrayBuffer))
else
deferred.reject(new Error("Can't do it"))
req.send(null)
return deferred.promise
processTile = ->
done = false
skip = false
pix_i = 0
polygons = []
polyLayers = []
while !done
if !skip
addPixel()
if pix_i % pack_size == 0
yield wait(1)
skip = false
nb = neighbors[neighbors_i]
if nb == 255
nb = 0
for i in [0..7]
if i < 4
dir_back = 1 << (i + 4)
else
dir_back = 1 << (i - 4)
dir_next = go_get_dir(1 << i, false)
if dir_next == dir_back
nb = nb | (1 << i)
neighbors[neighbors_i] = nb
if nb == 0
if neighbors_i == 0
done = true
else
addPixel()
if pix_i % pack_size == 0
yield wait(1)
go_down = true
while go_down
go_get_dir(tiles[0][y * tile_width + x], true)
neighbors_i -= 1
nb = neighbors[neighbors_i]
i = find1(nb)
nb = nb & (255 - (1 << i))
if nb == 0
if neighbors_i == 0
go_down = false
done = true
else
go_down = false
skip = true
neighbors[neighbors_i] = nb
else
neighbors_i += 1
if neighbors_i == neighbors_memsize
neighbors_new = new Uint8Array(neighbors_memsize * 2)
for i in [0..(neighbors_memsize - 1)]
neighbors_new[i] = neighbors[i]
neighbors = neighbors_new
neighbors_memsize *= 2
neighbors[neighbors_i] = 255
i = find1(nb)
go_get_dir(1 << i, true)
if done
for layer in polyLayers
map.removeLayer(layer)
watershed = turf.merge(turf.featurecollection(polygons))
watershed.properties = {
"fill": "#6BC65F",
"stroke": "#6BC65F",
"stroke-width": 1
}
watershedLayer = L.mapbox.featureLayer(watershed).addTo(map)
outletLayer = L.mapbox.featureLayer(outlet).addTo(map)
outletLayer.bindPopup('<strong>Area</strong> = ' + round(turf.area(watershed) / 1e6, 1).toString() + ' km²').addTo(map)
watershedLayer.on('mouseover', (e) -> outletLayer.openPopup())
watershedLayer.on('click', (e) ->
url = 'data:text/json;charset=utf8,' + encodeURIComponent(JSON.stringify(watershed.geometry))
link = document.createElement('a')
link.href = url
link.download = 'watershed.json'
link.click()
alert('Watershed GeoJSON downloaded')
)
find1 = (a) ->
i = 0
while (a & 1) == 0
a = a >> 1
i += 1
return i
go_get_dir = (dir, go) ->
x_next = x
y_next = y
x_deg_next = x_deg
y_deg_next = y_deg
tile_i = 0
if dir == 1
x_next += 1
else if dir == 2
x_next += 1
y_next += 1
else if dir == 4
y_next += 1
else if dir == 8
x_next -= 1
y_next += 1
else if dir == 16
x_next -= 1
else if dir == 32
x_next -= 1
y_next -= 1
else if dir == 64
y_next -= 1
else if dir == 128
x_next += 1
y_next -= 1
x_deg_next += (x_next - x) * pix_deg
y_deg_next -= (y_next - y) * pix_deg
if x_next == -1 and y_next == -1
x_next = tile_width - 1
y_next = tile_width - 1
if go
tiles[1] = tiles[7]
tiles[2] = tiles[0]
tiles[3] = tiles[5]
tiles[0] = tiles[6]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[4] = 0
tiles[5] = 0
tiles[6] = 0
tiles[7] = 0
tiles[8] = 0
else
tile_i = 6
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if x_next == tile_width and y_next == -1
x_next = 0
y_next = tile_width - 1
if go
tiles[3] = tiles[1]
tiles[4] = tiles[0]
tiles[5] = tiles[7]
tiles[0] = tiles[8]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[2] = 0
tiles[1] = 0
tiles[8] = 0
tiles[7] = 0
tiles[6] = 0
else
tile_i = 8
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if x_next == tile_width and y_next == tile_width
x_next = 0
y_next = 0
if go
tiles[5] = tiles[3]
tiles[6] = tiles[0]
tiles[7] = tiles[1]
tiles[0] = tiles[2]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[4] = 0
tiles[3] = 0
tiles[2] = 0
tiles[1] = 0
tiles[8] = 0
else
tile_i = 2
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if x_next == -1 and y_next == tile_width
x_next = tile_width - 1
y_next = 0
if go
tiles[7] = tiles[5]
tiles[8] = tiles[0]
tiles[1] = tiles[3]
tiles[0] = tiles[4]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[6] = 0
tiles[5] = 0
tiles[4] = 0
tiles[3] = 0
tiles[2] = 0
else
tile_i = 4
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if y_next == -1
y_next = tile_width - 1
if go
tiles[4] = tiles[5]
tiles[3] = tiles[0]
tiles[2] = tiles[1]
tiles[5] = tiles[6]
tiles[0] = tiles[7]
tiles[1] = tiles[8]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[6] = 0
tiles[7] = 0
tiles[8] = 0
else
tile_i = 7
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if x_next == tile_width
x_next = 0
if go
tiles[6] = tiles[7]
tiles[5] = tiles[0]
tiles[4] = tiles[3]
tiles[7] = tiles[8]
tiles[0] = tiles[1]
tiles[3] = tiles[2]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[8] = 0
tiles[1] = 0
tiles[2] = 0
else
tile_i = 1
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if y_next == tile_width
y_next = 0
if go
tiles[6] = tiles[5]
tiles[7] = tiles[0]
tiles[8] = tiles[1]
tiles[5] = tiles[4]
tiles[0] = tiles[3]
tiles[1] = tiles[2]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[4] = 0
tiles[3] = 0
tiles[2] = 0
else
tile_i = 3
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
else if x_next == -1
x_next = tile_width - 1
if go
tiles[8] = tiles[7]
tiles[1] = tiles[0]
tiles[2] = tiles[3]
tiles[7] = tiles[6]
tiles[0] = tiles[5]
tiles[3] = tiles[4]
if tiles[0] == 0
tiles[0] = yield getTile(get_url(y_deg_next, x_deg_next, false))
tiles[6] = 0
tiles[5] = 0
tiles[4] = 0
else
tile_i = 5
if tiles[tile_i] == 0
tiles[tile_i] = yield getTile(get_url(y_deg_next, x_deg_next, false))
if go
x = x_next
y = y_next
x_deg = x_deg_next
y_deg = y_deg_next
return tiles[tile_i][y_next * tile_width + x_next]
map_on_click = (evt) ->
url = get_url(evt.latlng.lat, evt.latlng.lng, true)
outlet = turf.point([x_deg, y_deg])
neighbors_i = 0
neighbors[0] = 255
tiles = [0, 0, 0, 0, 0, 0, 0, 0, 0]
Q.spawn(run)
run = ->
tiles[0] = yield getTile(url)
Q.async(processTile)()
map.on('click', map_on_click)
round = (number, precision) ->
mult = Math.pow(10, precision)
return Math.round(number * mult) / mult
get_url = (lat, lon, set_xy) ->
lat = round(lat, 5)
lon = round(lon, 5)
ret = {}
lat0 = 90
lon0 = -180
lat_str
lon_str
tile_name
tile_code = { '40N_80W': 'njt5o2dpcx9lzig', '20N_30E': 'ls8f3pyhl7f3ysq', '70N_160E': 'rcdlrof5vnpq4u8', '40S_110E': 'pli2vv4tu7zg0vc', '10S_60W': 'vz169b4rb0dpokv', '10N_180E': '7cm7k4ns9efdyyj', '0N_0E': 'q3c4m9jlfpxqc63', '50N_70E': 'd9ihizwythu4mki', '50N_130W': '9l3gynlr804gw6k', '10S_60E': 'mxd445xbzoq68wz', '70N_60W': 'w4ksxwb2sxo92ia', '70N_90W': '643krk0ahqegh29', '60N_0E': 'ig9np311apxwywu', '40N_170E': 'a9f68i00sddb21h', '60N_90E': '7ppd0auquja7cha', '40N_60W': '6cqvbwcf4hjwbuq', '20S_100W': 'v0yeu59q4eopq2t', '0N_60W': '8h7bnwjhk36m4xq', '10N_140E': 'xo6kdts6wijvftn', '50N_100E': 'qr043ar5gaflp25', '40N_70W': 'fv02n108a3t471m', '60N_180E': 'wm7ai83hmlw0gbh', '50N_30E': '74bsr18q8aj5gzz', '10S_30E': 'bp2gai5uwkcolw2', '0N_50E': 'hqo12wfpq7q0ybe', '20N_150E': 'xpbqct99r7x1uxg', '10N_40E': 'kyko320y1xmzid6', '70N_50E': 'fjvhcu58630jg5t', '70N_100W': 'zm5uo7bo8so4ml4', '0N_80W': '4hrms9iaijj9quu', '50S_130E': 'x3lvela6fbjw32n', '30S_120E': 'pdmy538eze0j8ii', '20S_30E': 'us5v7ggmkb4j9jz', '10N_130E': 'rmm098zv13hjbcz', '20N_130E': '2ahcbqp11ymyyl5', '50N_110W': 'rqqtu2kfjbsg634', '30N_130W': 's2f49ctthghvnqa', '50N_40E': 'o4vx09kuzncbkm1', '40N_130E': 'cztyw8et0ofxzi8', '40N_180E': 'svm09gq9yz85yrm', '0N_170E': 'fw6prlx0d08x5o0', '10N_110E': '6jbc195o85tgx4l', '70N_70E': '469mlarc381lsom', '60N_80E': 'fxihjscygbq7m5v', '20S_20E': '1shz7rjreu3rmga', '20S_120E': 'vhturkmybky6or6', '10N_100W': 'a8e5grbrelki50k', '50N_0E': 'c95qdkj3t3ikt3u', '20N_20W': 'nuvxx950y7ko46f', '50N_100W': 'gjrtaneav8mc5he', '60N_130W': 'spwzdn8gm4406wo', '70N_180E': '8y8ldhxz48b50h0', '10S_100W': 'mdig6tpluqggw5r', '40N_30E': 'flmc5oftqvlcfvh', '20N_50W': '32j7an9zu6ppxob', '30N_120W': 'yz3r44lstmrbq4n', '20S_170E': 'raw3sdolobx5m6b', '30N_120E': 'webmh73x6nzykbq', '40S_50W': '9kcrobjb81urhf7', '30N_40E': 'aqswmk85xawse1x', '70N_150E': 'acy3j9jkybnnhfn', '20S_40E': 'dk9y0vb70stdbgo', '10S_90E': 'fzggjjsa4riaoxv', '20N_70E': '8o7uspbksjjjfte', '10N_60W': '1iu2g7qws543s77', '50N_180E': '86768dlqamgdhnp', '70N_40E': 'ebvr0x8xonc8tu9', '40N_90E': 'kgu11ddovji6qg0', '30N_60W': 'cjlju7rif77tm9p', '50S_140E': '0p7qhfjoezohmvg', '0N_150E': '59xy13gw2aftsoy', '20N_160E': 'r1tendiqpssbrgj', '30N_140E': 'gfdh6brfbu6ozr3', '60N_110W': '27glhbgxcvjdsj3', '40N_40E': '38x1dzu1hgmuo10', '70N_110E': 'ilfcu0jimcuu22y', '30S_100W': 'he5a0jhj7b3u37m', '50S_40W': 'ul76r0hqufkkito', '20N_100E': 'zv0ftnkg6978d1n', '0N_10E': 'e6zwm2ve6170rnc', '40S_70W': 'lt520yjkzvobjs0', '50N_130E': 'prr63cqsy2sq6l5', '50S_170E': 'j66g3gmsr97hz7w', '40N_100W': 'seu1iym7l3yawvr', '60N_10E': 'conbfw17m90cr65', '30N_70E': 'dgl15onm7366j9y', '40N_110W': 'x9d0c0nusvsnvkf', '0N_40W': '7d62jroploskrdz', '10N_30E': 'ufiiimxmi9q5rsq', '40N_10E': 'evdq82t5hnvlgup', '30N_150E': 'ju0vhdvs9q32mcf', '30N_80W': 'azwymrifj8020k5', '60N_30E': '3fo08jcqwvd2hri', '10N_20E': 'xue5zm4fbmzmo5l', '30N_100W': '7d4uan2bp2fyo5t', '20S_50W': 'lj5qpdmycd18i9s', '50N_80W': 'd01j1rqigwd6r4n', '30N_160E': '5huu7ehl9qvm434', '10S_50E': 'mp0r86di46cad30', '50N_90W': '62cjaxm4pwon3ta', '30S_70W': 'vcjchqdowlocrte', '70N_120E': 'z9vss9nffu130ya', '30N_130E': 'f1jumdi52vcg5hx', '20S_20W': 'ach4qdtxa6cvfoe', '60N_100W': 'iwcq9ogntx9h9zr', '0N_160E': 'cpmu98nntsai0fu', '50N_10W': 'jhfliz911qffjch', '60N_70E': 'rewb9fzmlpem67g', '20S_80W': '6yqay3jos6sthn9', '50S_50W': 'tt563tgfn2iccrm', '10S_10E': '10b693pj08lhph4', '0N_130E': 'n0yo92yfvocy2ys', '10N_50W': 'ni2bepgw20kfivr', '10N_120E': 'm4dqmeh8mkq8f09', '40N_160E': '3dfcmd7p8xvjyk5', '70N_10E': '3yfx21j7nggc6vg', '70N_30E': '4m9zcz4eueif5if', '30S_50E': 'ei77gp02xpl6234', '70N_80W': 'xsxbixdmjhuxbom', '40S_170E': '5tyi2av2p794x1k', '10N_0E': 'ut7jw1vksl7ospe', '50N_90E': '2tbtweuwsgououn', '70N_130E': 'pxqkn9t5b1lv16o', '50S_100W': 'jcch94px3a3lrkv', '30N_170E': 'x51q62qkeogycvj', '30S_110E': 'ref43ht78h1mxkl', '60N_100E': '91v4qmizu1t5chm', '70N_20W': 'cqysdk36jpky7sl', '10S_140E': 'sc1qd7xfskk1190', '50S_180E': '2r7oq34nuyrbrmz', '50N_20W': '0a3mfbgr4b3fwkf', '50S_60W': 'a3fakfcx18xebqw', '20N_100W': 'atj10syx395lock', '20N_40W': 'v78c8iig9u05c2c', '30S_40E': '9hjqr2yikdpp8pt', '10S_130E': 'uudwt6x8dp9w38o', '40N_150E': 'icd2nb7b7o6orbg', '50N_10E': 'r6uogmh1fpsg5gu', '20N_50E': 'znznm95m5u60fk3', '10S_160E': 'ibj3o24opajv5gl', '70N_10W': '57kfww0wfmvlr9c', '40N_10W': '93pww6nj0vdmkwh', '20N_110E': 'y2ltu7r6nulfn6z', '10N_20W': 'baivyy025t4gca6', '10N_80W': 'gksccwsgv0br8kv', '50S_80W': 'esgszubtsdhwc0d', '70N_0E': 'jmq6q20u1zzqe78', '10N_90W': 'ms46fc02ddfggaa', '40N_0E': 'brm28xvjp7txu6a', '40N_20W': 'j6aclal8hjj43sq', '20N_90E': '7kj50ke3t9dg2k1', '10N_70W': '1ehlf63ztq9ascf', '30S_10W': 'l76jxgrjc9chfq8', '30N_30E': 'c426bked8bs1p2x', '70N_140E': '0arx8x4o20tuc3j', '30N_110W': 'r50rg4dyyzlq2rp', '20N_80E': 'chyvj6484m3yyzw', '70N_170E': 'brlsfizhofanf9h', '50N_160E': '1bndf15xeaz75db', '60N_120E': 'qxun7audymzvs2j', '10S_120E': '4k9oiq72iojd7tw', '50N_120E': '1nvf48c3i5ntgfp', '50S_160E': 'kzzv6vaupevo667', '30N_20E': 'g59ucu9csoroh6d', '50S_110E': '5sc9507h87n9rk2', '20S_140E': '81plt39owmcx29t', '20S_40W': 'upmd0pogjc6vmwb', '10N_80E': 'qnumh0vszwhwg3e', '60N_120W': 'ekuqu87q69r1k24', '70N_110W': '6gaa13v5gnb7p3k', '50N_150E': 'm0voo0ef0t6ik5u', '10N_110W': 'pysk4tlowiynzkq', '10S_70W': 'b1buj0ma7xzkz9g', '40N_140W': 'q6hg1x2eapx4nzp', '0N_180E': 'xeq06zwex8tgz1g', '20S_50E': 'ry284o47frvh75s', '70N_80E': 'am8y1bepl6cimzq', '20S_10W': 'swy8xxdhqwkwzrf', '40N_80E': 'sq99xh0kj2e4iiu', '40S_130E': 'pniyneh9o29glhk', '50N_170E': 'osp3iio527u8a9m', '10N_40W': 'dhuv56y24w8k5nj', '30N_60E': 'vrdv94uy3p01gu9', '60N_50E': 'w6dokrajdg4vlx0', '60N_20W': 'pnlvqfblgfaaz4k', '60N_140W': 'igfgzntr4930h6s', '40N_50E': '30w4q6cpa4njbwb', '20S_160E': 'xmcripl7n2gygx8', '30N_70W': 'zq3bwir60cxbl2y', '10S_50W': 'ednjxma5fiup6l0', '30S_10E': '8wnoefc87uiiz8f', '20N_60E': 'wnf5qjng14lm3z6', '60N_110E': 'ecqbskcnw1qvx4d', '60N_70W': 'hwlnvkr1qrpnzc3', '40N_120W': 'z4797cg79jm46sd', '20S_70W': 'ewdv0bntx3xq090', '20S_150E': 'mhha19x5mf5seb2', '20N_80W': '41186p3wtvnp92a', '0N_50W': '9888rp2gt8ul4fl', '70N_100E': 'ukrwe7fx8ej6rkh', '10S_70E': 'zjslhzj7t3k05fr', '30S_140E': '71cke0qt9qj6qpo', '0N_10W': 'mqwhdvq5fpm5dvq', '60N_150E': 'hz1fv9czziyt4ft', '50S_70W': 'm2kycfffxxfuy3n', '30S_60W': 'mukv3pxvbwuxmv0', '20N_180E': 'vluofrfqlq1tq7d', '30S_80W': 'cywvswzxjdu0rke', '20S_60W': '9j6n6fn7z21nr1x', '20N_120W': 'nkvf20ojt3uxfek', '0N_100E': 'vsurwf60amex45l', '20N_70W': '17bv1gg3a9o27j1', '50N_50E': 'o1cndow58eg4iht', '10S_40E': 'p6n7ppnucthj3ri', '50S_90W': 'd76j559itl1d94f', '40N_140E': 'p78aivsuyysht3s', '0N_110E': 'd208ls5h0kaagjr', '10S_180E': 'ovzi3yf799mdb7l', '20N_0E': 'l70nfmxvozjd7k7', '40N_130W': '9v5iq543yn2ns9n', '0N_20E': 'g5riug5jsfevtcv', '0N_20W': '1thdgulzf3ziwrt', '40S_90W': 'tiyymuz1v8z4z31', '40S_150E': 'j3op3bvu8m1okp5', '20S_110E': 'xj5a0fv2r6auchr', '20N_20E': '1p7asnpmqw9rq4u', '10S_20W': 'vv5xszaadhckg6d', '0N_70W': 'c3as6denh34ke5g', '30S_90W': 'lus6tbpitf8j9po', '20N_170E': '1ugbxtppm7x13vl', '60N_170E': 'a98i7rcqx5fvlbk', '30N_140W': 'klbrzjdsqub1wku', '30S_40W': 'lqcr3kc5v800l8c', '0N_90W': '0r0zd2dpg8kt3ds', '50S_150E': '49ilumtcabfq22g', '30S_0E': 'ervrbl0m3tvnpu3', '0N_40E': 'z6u00g9m0rdpesh', '30N_90E': '3rrz6jwiueeg0be', '70N_60E': 'mipyttald7cgs6d', '40N_110E': 'vbff46frv6pgkmu', '10N_70E': 'bfyxhbb0mejotb6', '30N_110E': 'mduywyb0ut5whmp', '10N_90E': '5e2weozv466qvq9', '20N_10W': 'nj0uz42z5rog76o', '50S_120E': 'iu81a15u7gp3nq4', '20S_130E': 'fs9s3xadluqlv5g', '30N_80E': 'fwswppy42c91zy6', '40S_180E': 'v6vj008uec9ja7t', '60N_160E': '5zpvo2b7vktti7a', '40S_100W': '7zg5lxozkgomo5p', '0N_60E': 'vqyqo67uszxkezj', '30S_20W': 'fud1p0ywbpmt03t', '10S_170E': 'nw5y90t4ntqtahj', '30N_90W': '9u9w2ov3cuw8ue2', '20N_140E': 'wbhp6xp57lbqu5b', '60N_130E': 'tfkokya89ywzrjf', '70N_130W': 'sk24ldyi0gez2y4', '40S_140E': '6t0ndzci1yvvzos', '40N_20E': '46y8e2drvpc0558', '20S_0E': 'km8fieuehf0ievc', '60N_60W': 'a607whft4tau57h', '10N_170E': 'v3yvprk884a4r40', '30S_130E': '7y6wgnf7ndwyyll', '30N_180E': 'hndze8kj0psdo9r', '0N_70E': '0aet2epmdtvnj3i', '30S_30E': 'x2rahasj2aewd46', '50N_60E': 'a3dsjcsd0fuog8n', '20N_60W': 'o9ufvfwny6q42do', '10N_10W': '6k8ral35jl00z8g', '40N_120E': '7jq4kyvdn87x4i5', '70N_20E': 'aueplubete1o2xd', '30N_100E': 'lfz50uivpdqb166', '40N_90W': 'vju0gkkfoa773o0', '10S_80W': '0ruc1riqnl3rzza', '10N_60E': 'n5ee7k9mfto1104', '0N_120E': 'sswv3cdzvyst3e9', '70N_140W': '4quswlwtvxn456c', '10S_80E': 'jo5p4do02ubwhbm', '0N_90E': 'iq7i2v764t4ha22', '0N_140E': 'jg6r27k9l4u32d6', '60N_40E': '907q33vq6a5o0fk', '10N_150E': 'ka1m1y1dha1z75c', '60N_140E': '0gid8dmrylip35b', '30N_0E': 'r7fe9ugsky80kz8', '50N_20E': '3ey731tlb7duy0m', '30S_50W': '1dlgwyangl2jnoe', '50N_140E': '528kneauqf3d1ip', '30S_180E': '1phrgmq8kstmabk', '30N_10W': '2rgou9qbqg3k3m9', '10S_0E': 'iyp67d9ksbx90x2', '0N_80E': 'sikidycmwntrrhl', '30S_150E': '2v7kjt4wgbu6uc4', '20N_10E': 'ipewhaim6kmcla1', '0N_100W': 'sh8m2mmxm0iznka', '60N_20E': '7ax1ly9l8s1brzn', '60N_10W': 'i81h1aerrhvppqo', '10S_10W': 'rf5bmnkwv4395tl', '50N_80E': 'axibpl1v3u6643c', '10N_160E': '6t399mcnovfvhhg', '10N_100E': 'vzznnr63l8ku0bs', '20N_110W': 'aq4jnu47230b7hy', '50N_120W': '3mqc9wub3lvt9um', '30N_50E': 'vaf57pswj0aqfsy', '40N_100E': 'h2h4mpg5oi2e54l', '30S_170E': 'xkx6036h76ecjx6', '10S_20E': 'vc7sn3ig5jheb5k', '40S_80W': 'vqwe0k1u9k1qm73', '60N_90W': '48j6ie4tr6jec12', '60N_80W': 'krvh5e1nw4s9i5x', '70N_70W': 'evb65pwb599es77', '50N_110E': 'hckwm8kss4s09yz', '10S_150E': 'xk2vrdpvffsw70f', '10S_100E': '69qzfyqj37bdzqo', '0N_30E': '8yn50z10zvxuxd8', '70N_90E': 'u5om8ivcg5g663u', '20S_180E': 'vln4eo9vjz0xpie', '10S_90W': 'rdwm5zsqb80xz2o', '50N_60W': '4iu67oqfj6112z7', '10S_40W': '7hcb9keu1g2zij2', '40S_60W': 'qgef1cr6lx7dnmd', '20N_40E': '45pfkm2wq0xbzdt', '20N_120E': 're9vszajn3g2kun', '40S_40W': '1e40jbe1kpadu4a', '70N_120W': 'kat0kityhil0udo', '40N_60E': 'tfhm8s5v8at0np7', '10S_110E': '23u98dlaf4ijfyx', '10N_50E': '4k0vr9qphd7zxg8', '30N_10E': '70ksdpgfdyw0xx1', '10N_10E': 'naw02lg2pnkc3on', '40N_70E': 'ovmgwi1ihsskf8w', '20N_90W': 'c6df5dqbun2fks6', '30S_160E': '4bkneeoybdekmhj', '10N_120W': 'd85cl3w5esblmdv', '40S_160E': 'eiznsrt6teww45l', '50N_70W': '2kkzkjo7wghnh0y', '20S_10E': '0higj0z4ufomc7i', '40S_120E': 'maodj881wx8mr11', '60N_60E': 'q9nk7xu6exy9olg', '30S_20E': '8g3og3gnzf8wtcb', '30N_20W': 'st34jv53y9uibap', '20S_90W': '7ca1iymo44vtapg', '50N_140W': 'a8x97yts3pns2zd' }
lon0 += 10 while lon >= lon0 + 10
lat0 -= 10 while lat <= lat0 - 10
if lat0 < 0
lat_str = (-lat0).toString() + 'S'
else
lat_str = lat0.toString() + 'N'
if lon0 < 0
lon_str = (-lon0).toString() + 'W'
else
lon_str = lon0.toString() + 'E'
tile_name = lat_str + '_' + lon_str
url = 'https://dl.dropboxusercontent.com/s/' + tile_code[tile_name] + '/tile_' + tile_name + '.bin?dl=1'
if set_xy
x = Math.round((lon - lon0) / pix_deg)
y = Math.round((lat0 - lat) / pix_deg)
x_deg = lon0 + x * pix_deg
y_deg = lat0 - y * pix_deg
return url
The bug was already reported here:
https://github.com/kriskowal/q/issues/616
The proposed workaround worked fine for me.