forked from enricofer/go2mapillary
/
mapillary_coverage.py
351 lines (302 loc) · 15.1 KB
/
mapillary_coverage.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
go2mapillary
A QGIS plugin
mapillary explorer
-------------------
begin : 2016-01-21
git sha : $Format:%H$
copyright : (C) 2016 by enrico ferreguti
email : enricofer@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
import os
import sys
from shapely.geometry import Polygon
import mapbox_vector_tile
import requests
import math
import json
import datetime
import mercantile
import tempfile
from qgis.PyQt.QtCore import QSettings, Qt
from qgis.PyQt.QtWidgets import QProgressBar, QApplication, QAction
from qgis.core import QgsPointXY, QgsCoordinateReferenceSystem, QgsCoordinateTransform, QgsVectorLayer, QgsProject, QgsExpressionContextUtils, Qgis, QgsMessageLog, QgsMapLayer
from qgis.gui import QgsMessageBar
SERVER_URL = r"https://d25uarhxywzl1j.cloudfront.net/v0.1/{z}/{x}/{y}.mvt"
LAYER_LEVELS = ['overview', 'sequences', 'images']
CACHE_EXPIRE_HOURS = 24
def deg2num(lat_deg, lon_deg, zoom):
lat_rad = math.radians(lat_deg)
n = 2.0 ** zoom
xtile = int((lon_deg + 180.0) / 360.0 * n)
ytile = int((1.0 - math.log(math.tan(lat_rad) + (1 / math.cos(lat_rad))) / math.pi) / 2.0 * n)
return (xtile, ytile)
def num2deg(xtile, ytile, zoom):
n = 2.0 ** zoom
lon_deg = xtile / n * 360.0 - 180.0
lat_rad = math.atan(math.sinh(math.pi * (1 - 2 * ytile / n)))
lat_deg = math.degrees(lat_rad)
return (lat_deg, lon_deg)
def ZoomForPixelSize(pixelSize):
"Maximal scaledown zoom of the pyramid closest to the pixelSize."
for i in range(30):
if pixelSize > (180 / 256.0 / 2**i):
return i-1 if i!=0 else 0 # We don't want to scale up
#get the range of tiles that intersect with the bounding box of the polygon
def getTileRange(bnds, zoom):
xm=bnds[0]
xmx=bnds[2]
ym=bnds[1]
ymx=bnds[3]
bottomRight=(xmx,ym)
starting=deg2num(ymx,xm, zoom)
ending=deg2num(ym,xmx, zoom) # this will be the tiles containing the ending
x_range=(starting[0],ending[0])
y_range=(starting[1],ending[1])
return(x_range,y_range)
#to get the tile as a polygon object
def getTileASpolygon(z,y,x):
nw=num2deg(x,y,z)
se=num2deg(x+1, y+1, z)
xm=nw[1]
xmx=se[1]
ym=se[0]
ymx=nw[0]
tile_bound=Polygon([(xm,ym),(xmx,ym),(xmx,ymx),(xm,ymx)])
return tile_bound
#to tell if the tile intersects with the given polygon
def doesTileIntersects(z, y, x, polygon):
if(z<10): #Zoom tolerance; Below these zoom levels, only check if tile intersects with bounding box of polygon
return True
else:
#get the four corners
tile=getTileASpolygon(x,y,z)
return polygon.intersects(tile)
#convert the URL to get URL of Tile
def getURL(x,y,z,url):
u=url.replace("{x}", str(x))
u=u.replace("{y}", str(y))
u=u.replace("{z}", str(z))
return u
def getProxiesConf():
s = QSettings() # getting proxy from qgis options settings
proxyEnabled = s.value("proxy/proxyEnabled", "")
proxyType = s.value("proxy/proxyType", "")
proxyHost = s.value("proxy/proxyHost", "")
proxyPort = s.value("proxy/proxyPort", "")
proxyUser = s.value("proxy/proxyUser", "")
proxyPassword = s.value("proxy/proxyPassword", "")
if proxyEnabled == "true" and proxyType == 'HttpProxy': # test if there are proxy settings
proxyDict = {
"http": "http://%s:%s@%s:%s" % (proxyUser, proxyPassword, proxyHost, proxyPort),
"https": "http://%s:%s@%s:%s" % (proxyUser, proxyPassword, proxyHost, proxyPort)
}
return proxyDict
else:
return None
class progressBar:
def __init__(self, parent, title = ''):
'''
progressBar class instatiation method. It creates a QgsMessageBar with provided msg and a working QProgressBar
:param parent:
:param msg: string
'''
self.iface = parent.iface
self.title = title
def start(self,max=0, msg = ''):
self.widget = self.iface.messageBar().createMessage(self.title,msg)
self.progressBar = QProgressBar()
self.progressBar.setRange(0,max)
self.progressBar.setValue(0)
self.progressBar.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
self.widget.layout().addWidget(self.progressBar)
QApplication.processEvents()
self.iface.messageBar().pushWidget(self.widget, Qgis.Info, 50)
QApplication.processEvents()
def setProgress(self,value):
try:
self.progressBar.setValue(value)
QApplication.processEvents()
except:
pass
def setMsg(self,msg):
self.widget.setText(msg)
QApplication.processEvents()
def stop(self, msg = ''):
'''
the progressbar is stopped with a succes message
:param msg: string
:return:
'''
self.iface.messageBar().clearWidgets()
message = self.iface.messageBar().createMessage(self.title,msg)
self.iface.messageBar().pushWidget(message, Qgis.Info, 2)
class mapillary_coverage:
expire_time = datetime.timedelta(hours=CACHE_EXPIRE_HOURS)
def __init__(self,module):
self.module = module
self.iface = module.iface
self.cache_dir = os.path.join(tempfile.gettempdir(),'go2mapillary')
QgsMessageLog.logMessage("CACHE_DIR"+self.cache_dir, tag="go2mapillary",level=Qgis.Info)
if not os.path.exists(self.cache_dir):
os.makedirs(self.cache_dir)
self.setDefaultLayers()
self.actual_ranges = None
def setDefaultLayers(self):
defaultContent = '{"type": "FeatureCollection", "features": []}'
for ld in LAYER_LEVELS:
with open(os.path.join(self.cache_dir, 'mapillary_%s.geojson' % ld), 'w') as f:
f.write(defaultContent)
defLyr = QgsVectorLayer(os.path.join(self.cache_dir, 'mapillary_%s.geojson' % ld),"Mapillary "+ld, "ogr")
defLyr.setCrs(QgsCoordinateReferenceSystem(4326))
setattr(self, ld+'Layer', defLyr)
def transformToWGS84(self, pPoint):
# transformation from the current SRS to WGS84
crcMappaCorrente = self.iface.mapCanvas().mapSettings().destinationCrs() # get current crs
crsSrc = crcMappaCorrente
crsDest = QgsCoordinateReferenceSystem(4326) # WGS 84
xform = QgsCoordinateTransform(crsSrc, crsDest, QgsProject.instance())
return xform.transform(pPoint) # forward transformation: src -> dest
def download_tiles(self, force=None):
#calculate zoom_level con current canvas extents
ex = self.iface.mapCanvas().extent()
wgs84_minimum = self.transformToWGS84(QgsPointXY (ex.xMinimum(),ex.yMinimum()))
wgs84_maximum = self.transformToWGS84(QgsPointXY (ex.xMaximum(),ex.yMaximum()))
bounds =(wgs84_minimum.x(),wgs84_minimum.y(),wgs84_maximum.x(),wgs84_maximum.y())
map_units_per_pixel = (wgs84_maximum.x() - wgs84_minimum.x())/self.iface.mapCanvas().width()
zoom_level = ZoomForPixelSize(map_units_per_pixel)
if zoom_level > 14:
zoom_level = 14
try:
ranges = getTileRange(bounds, zoom_level)
except ValueError:
return
if not self.actual_ranges or not (
ranges[0][0]==self.actual_ranges[0][0] and
ranges[0][1]==self.actual_ranges[0][1] and
ranges[1][0]==self.actual_ranges[1][0] and
ranges[1][1]==self.actual_ranges[1][1]):
#print ("ZOOM_LEVEL", zoom_level, "NEW RANGES", ranges, "LAST RANGES", self.actual_ranges)
self.actual_ranges = ranges
x_range = ranges[0]
y_range = ranges[1]
overview_features = []
sequences_features = []
images_features = []
progress = progressBar(self, 'go2mapillary')
start_time = datetime.datetime.now()
for y in range(y_range[0], y_range[1] + 1):
for x in range(x_range[0], x_range[1] + 1):
folderPath = os.path.join(self.cache_dir, str(zoom_level), str(x))
filePathMvt = os.path.join(folderPath, str(y) + '.mvt')
#filePathJson = os.path.join(folderPath, str(y) + '.json')
if not os.path.exists(folderPath):
os.makedirs(folderPath)
res = None
if not os.path.exists(filePathMvt) or (datetime.datetime.fromtimestamp(os.path.getmtime(filePathMvt)) < (datetime.datetime.now() - self.expire_time) ):
# make the URL
url = getURL(x, y, zoom_level, SERVER_URL)
with open(filePathMvt, 'wb') as f:
response = requests.get(url, proxies=getProxiesConf(), stream=True)
total_length = response.headers.get('content-length')
if total_length is None: # no content length header
f.write(response.content)
else:
dl = 0
total_length = int(total_length)
progress.start(total_length,'caching vector tile [%d,%d,%d]' % (x, y, zoom_level))
QgsMessageLog.logMessage("MISS [%d,%d,%d]" % (x, y, zoom_level), tag="go2mapillary",
level=Qgis.Info)
for data in response.iter_content(chunk_size=4096):
dl += len(data)
f.write(data)
progress.setProgress(dl)
if os.path.exists(filePathMvt):
progress.start(0, 'loading vector tile [%d,%d,%d]' % (x, y, zoom_level))
if not res:
with open(filePathMvt, "rb") as f:
mvt = f.read()
QgsMessageLog.logMessage("CACHE [%d,%d,%d]" % (x, y, zoom_level), tag="go2mapillary",
level=Qgis.Info)
else:
mvt = res.content
bounds = mercantile.bounds(x,y,zoom_level)
tile_box = (bounds.west,bounds.south,bounds.east,bounds.north)
json_data = mapbox_vector_tile.decode(mvt, quantize_bounds=tile_box)
if "mapillary-sequence-overview" in json_data:
overview_features = overview_features + json_data["mapillary-sequence-overview"]["features"]
elif "mapillary-sequences" in json_data:
sequences_features = sequences_features + json_data["mapillary-sequences"]["features"]
if "mapillary-images" in json_data and zoom_level==14:
images_features = images_features + json_data["mapillary-images"]["features"]
print("loading time", datetime.datetime.now() - start_time)
progress.stop('loading complete')
for level in LAYER_LEVELS:
geojson_file = os.path.join(self.cache_dir, "mapillary_%s.geojson" % level)
try:
QgsProject.instance().removeMapLayer(getattr(self, level+'Layer').id())
except:
pass
if locals()[level+'_features']:
setattr(self,level,True)
geojson = {
"type": "FeatureCollection",
"features": locals()[level+'_features']
}
with open(geojson_file, 'w') as outfile:
json.dump(geojson, outfile)
defLyr = QgsVectorLayer(os.path.join(self.cache_dir, 'mapillary_%s.geojson' % level),"Mapillary " + level, "ogr")
defLyr.loadNamedStyle(os.path.join(os.path.dirname(__file__), "res", "mapillary_%s.qml" % level))
QgsExpressionContextUtils.setLayerVariable(defLyr, "mapillaryCurrentKey", self.module.viewer.locationKey)
defLyr.setCrs(QgsCoordinateReferenceSystem(4326))
QgsProject.instance().addMapLayer(defLyr)
self.iface.addCustomActionForLayerType(getattr(self.module,'filterAction_'+level), None, QgsMapLayer.VectorLayer, allLayers=False)
self.module.filterDialog.applySqlFilter(layer=defLyr)
self.iface.addCustomActionForLayer(getattr(self.module,'filterAction_'+level), defLyr)
legendLayerNode = QgsProject.instance().layerTreeRoot().findLayer(defLyr.id())
legendLayerNode.setExpanded(False)
setattr(self, level + 'Layer', defLyr)
else:
setattr(self, level, False)
else:
pass
#print ("SAME RANGES")
def has_overview(self):
return self.overview
def has_sequences(self):
return self.sequences
def has_images(self):
return self.images
def removeLevels(self):
for level in LAYER_LEVELS:
try:
QgsProject.instance().removeMapLayer(getattr(self, level + 'Layer').id())
except:
pass
self.iface.mapCanvas().refresh()
def getActiveLevels(self):
activeLevels = {}
for level in LAYER_LEVELS:
if getattr(self,level):
activeLevels[level] = getattr(self, level+'Layer')
return activeLevels
def getActiveLayers(self):
levels = []
for level in LAYER_LEVELS:
if getattr(self,level):
levels.append(getattr(self, level+'Layer'))
return levels
def update_coverage(self, force=None):
self.download_tiles(force=force)
return self.getActiveLevels()