class ViewMap(BoxLayout):
def __init__(self, **kwargs):
super(ViewMap, self).__init__(**kwargs)
self.build()
def build(self):
self.mapview = MapView(lat=51.48, lon=-3.17, zoom=11)
self.mapLayer = MarkerMapLayer()
for i in locations:
locationLat = float(locations[i][0])
locationLon = float(locations[i][1])
marker = MapMarker(lat=locationLat, lon=locationLon)
self.mapLayer.add_widget(marker)
self.mapview.add_layer(self.mapLayer)
self.add_widget(self.mapview)
def update(self):
print('updating map')
def nodeExpanded(self):
print('expanded node')
def nodeColapsed(self):
print('node colapsed')
class Editor(GridLayout):
current_layer = None
edit_last_move = None
markers = []
mode = StringProperty("polygon")
is_editing = BooleanProperty(False)
map_source = ObjectProperty()
geojson_fn = StringProperty()
title = StringProperty()
def __init__(self, **kwargs):
super(Editor, self).__init__(**kwargs)
self.marker_layer = MarkerMapLayer()
self.current_layer = GeoJsonMapLayer()
self.result_layer = GeoJsonMapLayer()
self.result_layer.geojson = kwargs["geojson"]
self.geojson_fn = kwargs["geojson_fn"]
self.ids.mapview.add_widget(self.current_layer)
self.ids.mapview.add_widget(self.result_layer)
self.ids.mapview.add_widget(self.marker_layer)
def on_touch_down(self, touch):
if self.ids.mapview.collide_point(*touch.pos):
if touch.is_double_tap and not self.is_editing:
feature = self.select_feature(*touch.pos)
if feature:
self.edit_feature(feature)
else:
touch.grab(self)
self.forward_to_object(touch)
return True
elif touch.is_double_tap and self.is_editing:
if self.remove_marker_at(touch):
return True
touch.grab(self)
return self.forward_to_object(touch)
elif not self.is_editing:
self.select_feature(*touch.pos)
return self.ids.mapview.on_touch_down(touch)
return super(Editor, self).on_touch_down(touch)
def on_touch_move(self, touch):
if touch.grab_current == self and self.is_editing:
return self.forward_to_object(touch, move=True)
return super(Editor, self).on_touch_move(touch)
def switch_mode(self):
if self.is_editing:
self.finalize_object()
return
self.mode = "line" if self.mode == "polygon" else "polygon"
def forward_to_object(self, touch, move=False):
mapview = self.ids.mapview
if not self.is_editing:
self.is_editing = True
self.clear_markers()
coord = mapview.get_latlon_at(*touch.pos)
if move:
m = self.markers[-1]
else:
m = EditorMarker()
m.mapview = mapview
m.editor = self
self.markers.append(m)
self.marker_layer.add_widget(m)
self.marker_layer.reposition()
m.lat = coord.lat
m.lon = coord.lon
self._update_geojson()
return True
def clear_markers(self):
while self.markers:
self.remove_marker(self.markers.pop())
def remove_marker(self, m):
m.mapview = m.editor = None
self.marker_layer.remove_widget(m)
if m in self.markers:
self.markers.remove(m)
self._update_geojson()
def remove_marker_at(self, touch):
pos = self.ids.mapview.to_local(*touch.pos)
for marker in self.markers[:]:
if marker.collide_point(*pos):
self.remove_marker(marker)
return True
def finalize_object(self):
if self.markers:
geojson = self.current_layer.geojson
if "properties" not in geojson:
geojson["features"][0]["properties"] = {"title": self.title}
else:
geojson["features"][0]["properties"]["title"] = self.title
self.result_layer.geojson["features"].extend(geojson["features"])
self.ids.mapview.trigger_update(True)
self.clear_markers()
self.is_editing = False
self.title = ""
self._update_geojson()
def save_geojson(self):
with open(self.geojson_fn, "wb") as fd:
json.dump(self.result_layer.geojson, fd)
def _update_geojson(self):
features = []
if self.mode == "polygon":
geotype = "Polygon"
geocoords = lambda x: [x]
else:
geotype = "LineString"
geocoords = lambda x: x
# current commited path
if self.markers:
coordinates = [[c.lon, c.lat] for c in self.markers]
features.append({
"type": "Feature",
"properties": {},
"geometry": {
"type": geotype,
"coordinates": geocoords(coordinates)
}
})
geojson = {"type": "FeatureCollection", "features": features}
self.current_layer.geojson = geojson
self.ids.mapview.trigger_update(True)
def point_inside_polygon(self, x, y, poly):
n = len(poly)
inside = False
p1x, p1y = poly[0]
for i in range(n + 1):
p2x, p2y = poly[i % n]
if y > min(p1y, p2y) and y <= max(p1y, p2y) and x <= max(p1x, p2x):
if p1y != p2y:
xinters = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x
if p1x == p2x or x <= xinters:
inside = not inside
p1x, p1y = p2x, p2y
return inside
def select_feature(self, x, y):
coord = self.ids.mapview.get_latlon_at(x, y)
for feature in self.result_layer.geojson["features"]:
if feature["type"] != "Feature":
continue
geometry = feature["geometry"]
if geometry["type"] == "Polygon":
if self.point_inside_polygon(coord.lon, coord.lat,
geometry["coordinates"][0]):
return feature
def edit_feature(self, feature):
self.result_layer.geojson["features"].remove(feature)
#self.current_layer.geojson = feature
self.ids.mapview.trigger_update(True)
self.title = feature.get("properties", {}).get("title", "")
self.is_editing = True
self.clear_markers()
for c in feature["geometry"]["coordinates"][0]:
m = EditorMarker(lon=c[0], lat=c[1])
m.mapview = self.ids.mapview
m.editor = self
self.marker_layer.add_widget(m)
self.markers.append(m)
self._update_geojson()
class ISSScreen(Screen):
def __init__(self, **kwargs):
super(ISSScreen, self).__init__(**kwargs)
# Set the path for the folder
self.path = os.path.dirname(os.path.abspath(__file__))
# Set the path for local images
self.imagefolder = os.path.join(self.path, "images")
# Ephem calculates the position using the Two Line Element data
# We need to make sure we have up to date info
tle = self.get_TLE()
# Create an iss object from which we can get positional data
self.iss = ephem.readtle(*tle)
# Run the calculations
self.iss.compute()
# Get positon of iss and place a marker there
lat, lon = self.get_loc()
self.marker = MapMarker(lat=lat, lon=lon)
# Create a value to check when we last drew ISS path
self.last_path_update = 0
# Create the path icon
self.path_icon = os.path.join(self.imagefolder, "dot.png")
# Create the world map
self.map = MapView(id="mpv", lat=0, lon=0, zoom=1, scale=1.5)
x, y = self.map.get_window_xy_from(0, 0, 1)
self.map.scale_at(1.2, x, y)
# Add the ISS marker to the map and draw the map on the screen
self.map.add_widget(self.marker)
self.add_widget(self.map)
# Add a new layer for the path
self.mmlayer = MarkerMapLayer()
self.draw_iss_path()
self.timer = None
def on_enter(self):
self.timer = Clock.schedule_interval(self.update, 1)
def on_leave(self):
Clock.unschedule(self.timer)
def utcnow(self):
return (datetime.utcnow() - datetime(1970, 1, 1)).total_seconds()
def draw_iss_path(self):
# Path is drawn every 5 mins
if self.utcnow() - self.last_path_update > 30:
try:
self.map.remove_layer(self.mmlayer)
except:
pass
self.mmlayer = MarkerMapLayer()
# Create markers showing the ISS's position every 5 mins
for i in range(20):
lat, lon = self.get_loc(datetime.now() + timedelta(0, i * 300))
self.mmlayer.add_widget(
MapMarker(lat=lat, lon=lon, source=self.path_icon))
# Update the flag so we know when next update should be run
self.last_path_update = self.utcnow()
# Add the layer and call the reposition function otherwise the
# markers don't show otherwise!
self.map.add_layer(self.mmlayer)
self.mmlayer.reposition()
def get_TLE(self):
# Set some flags
need_update = False
# Set our data source and the name of the object we're tracking
source = "http://www.celestrak.com/NORAD/elements/stations.txt"
ISS = "ISS (ZARYA)"
# Get the current time
utc_now = self.utcnow()
# Set the name of our file to store data
data = os.path.join(self.path, "iss_tle.json")
# Try loading old data
try:
with open(data, "r") as savefile:
saved = json.load(savefile)
# If we can't create a dummy dict
except IOError:
saved = {"updated": 0}
# If old data is more than an hour hold, let's check for an update
if utc_now - saved["updated"] > 3600:
need_update = True
# If we don't have any TLE data then we need an update
if not saved.get("tle"):
need_update = True
if need_update:
# Load the TLE data
raw = requests.get(source).text
# Split the data into a neat list
all_sats = [sat.strip() for sat in raw.split("\n")]
# Find the ISS and grab the whole TLE (three lines)
iss_index = all_sats.index(ISS)
iss_tle = all_sats[iss_index:iss_index + 3]
# Prepare a dict to save our data
new_tle = {"updated": utc_now, "tle": iss_tle}
# Save it
with open(data, "w") as savefile:
json.dump(new_tle, savefile, indent=4)
# ephem needs strings not unicode
return [str(x) for x in iss_tle]
else:
# return the saved data (as strings)
return [str(x) for x in saved["tle"]]
def update(self, *args):
# Update the ISS with newest TLE
self.iss = ephem.readtle(*self.get_TLE())
# Get the position and update marker
lat, lon = self.get_loc()
self.marker.lat = lat
self.marker.lon = lon
self.map.remove_widget(self.marker)
self.map.add_widget(self.marker)
# Check if the path needs redrawing
self.draw_iss_path()
def get_loc(self, dt=None):
# We can get the location for a specific time as well
if dt is None:
self.iss.compute()
else:
self.iss.compute(dt)
# Convert the ephem data into something that the map can use
lat = float(self.iss.sublat / ephem.degree)
lon = float(self.iss.sublong / ephem.degree)
return lat, lon
class Editor(GridLayout):
current_layer = None
edit_last_move = None
markers = []
mode = StringProperty("polygon")
is_editing = BooleanProperty(False)
map_source = ObjectProperty()
geojson_fn = StringProperty()
title = StringProperty()
def __init__(self, **kwargs):
super(Editor, self).__init__(**kwargs)
self.marker_layer = MarkerMapLayer()
self.current_layer = GeoJsonMapLayer()
self.result_layer = GeoJsonMapLayer()
self.result_layer.geojson = kwargs["geojson"]
self.geojson_fn = kwargs["geojson_fn"]
self.ids.mapview.add_widget(self.current_layer)
self.ids.mapview.add_widget(self.result_layer)
self.ids.mapview.add_widget(self.marker_layer)
def on_touch_down(self, touch):
if self.ids.mapview.collide_point(*touch.pos):
if touch.is_double_tap and not self.is_editing:
feature = self.select_feature(*touch.pos)
if feature:
self.edit_feature(feature)
else:
touch.grab(self)
self.forward_to_object(touch)
return True
elif touch.is_double_tap and self.is_editing:
if self.remove_marker_at(touch):
return True
touch.grab(self)
return self.forward_to_object(touch)
elif not self.is_editing:
self.select_feature(*touch.pos)
return self.ids.mapview.on_touch_down(touch)
return super(Editor, self).on_touch_down(touch)
def on_touch_move(self, touch):
if touch.grab_current == self and self.is_editing:
return self.forward_to_object(touch, move=True)
return super(Editor, self).on_touch_move(touch)
def switch_mode(self):
if self.is_editing:
self.finalize_object()
return
self.mode = "line" if self.mode == "polygon" else "polygon"
def forward_to_object(self, touch, move=False):
mapview = self.ids.mapview
if not self.is_editing:
self.is_editing = True
self.clear_markers()
coord = mapview.get_latlon_at(*touch.pos)
if move:
m = self.markers[-1]
else:
m = EditorMarker()
m.mapview = mapview
m.editor = self
self.markers.append(m)
self.marker_layer.add_widget(m)
self.marker_layer.reposition()
m.lat = coord.lat
m.lon = coord.lon
self._update_geojson()
return True
def clear_markers(self):
while self.markers:
self.remove_marker(self.markers.pop())
def remove_marker(self, m):
m.mapview = m.editor = None
self.marker_layer.remove_widget(m)
if m in self.markers:
self.markers.remove(m)
self._update_geojson()
def remove_marker_at(self, touch):
pos = self.ids.mapview.to_local(*touch.pos)
for marker in self.markers[:]:
if marker.collide_point(*pos):
self.remove_marker(marker)
return True
def finalize_object(self):
if self.markers:
geojson = self.current_layer.geojson
if "properties" not in geojson:
geojson["features"][0]["properties"] = {"title": self.title}
else:
geojson["features"][0]["properties"]["title"] = self.title
self.result_layer.geojson["features"].extend(geojson["features"])
self.ids.mapview.trigger_update(True)
self.clear_markers()
self.is_editing = False
self.title = ""
self._update_geojson()
def save_geojson(self):
with open(self.geojson_fn, "wb") as fd:
json.dump(self.result_layer.geojson, fd)
def _update_geojson(self):
features = []
if self.mode == "polygon":
geotype = "Polygon"
geocoords = lambda x: [x]
else:
geotype = "LineString"
geocoords = lambda x: x
# current commited path
if self.markers:
coordinates = [[c.lon, c.lat] for c in self.markers]
features.append({
"type": "Feature",
"properties": {},
"geometry": {
"type": geotype,
"coordinates": geocoords(coordinates)
}
})
geojson = {"type": "FeatureCollection", "features": features}
self.current_layer.geojson = geojson
self.ids.mapview.trigger_update(True)
def point_inside_polygon(self, x, y, poly):
n = len(poly)
inside = False
p1x, p1y = poly[0]
for i in range(n + 1):
p2x, p2y = poly[i % n]
if y > min(p1y, p2y) and y <= max(p1y, p2y) and x <= max(p1x, p2x):
if p1y != p2y:
xinters = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x
if p1x == p2x or x <= xinters:
inside = not inside
p1x, p1y = p2x, p2y
return inside
def select_feature(self, x, y):
coord = self.ids.mapview.get_latlon_at(x, y)
for feature in self.result_layer.geojson["features"]:
if feature["type"] != "Feature":
continue
geometry = feature["geometry"]
if geometry["type"] == "Polygon":
if self.point_inside_polygon(coord.lon, coord.lat,
geometry["coordinates"][0]):
return feature
def edit_feature(self, feature):
self.result_layer.geojson["features"].remove(feature)
#self.current_layer.geojson = feature
self.ids.mapview.trigger_update(True)
self.title = feature.get("properties", {}).get("title", "")
self.is_editing = True
self.clear_markers()
for c in feature["geometry"]["coordinates"][0]:
m = EditorMarker(lon=c[0], lat=c[1])
m.mapview = self.ids.mapview
m.editor = self
self.marker_layer.add_widget(m)
self.markers.append(m)
self._update_geojson()
class ISSScreen(Screen):
def __init__(self, **kwargs):
super(ISSScreen, self).__init__(**kwargs)
# Set the path for the folder
self.path = os.path.dirname(os.path.abspath(__file__))
# Set the path for local images
self.imagefolder = os.path.join(self.path, "images")
# Ephem calculates the position using the Two Line Element data
# We need to make sure we have up to date info
tle = self.get_TLE()
# Create an iss object from which we can get positional data
self.iss = ephem.readtle(*tle)
# Run the calculations
self.iss.compute()
# Get positon of iss and place a marker there
lat, lon = self.get_loc()
self.marker = MapMarker(lat=lat, lon=lon)
# Create a value to check when we last drew ISS path
self.last_path_update = 0
# Create the path icon
self.path_icon = os.path.join(self.imagefolder, "dot.png")
# Create the world map
self.map = MapView(id="mpv",lat=0, lon=0, zoom=1, scale=1.5)
x, y = self.map.get_window_xy_from(0,0,1)
self.map.scale_at(1.2, x, y)
# Add the ISS marker to the map and draw the map on the screen
self.map.add_widget(self.marker)
self.add_widget(self.map)
# Add a new layer for the path
self.mmlayer = MarkerMapLayer()
self.draw_iss_path()
self.timer = None
def on_enter(self):
self.timer = Clock.schedule_interval(self.update, 1)
def on_leave(self):
Clock.unschedule(self.timer)
def utcnow(self):
return (datetime.utcnow() - datetime(1970,1,1)).total_seconds()
def draw_iss_path(self):
# Path is drawn every 5 mins
if self.utcnow() - self.last_path_update > 30:
try:
self.map.remove_layer(self.mmlayer)
except:
pass
self.mmlayer = MarkerMapLayer()
# Create markers showing the ISS's position every 5 mins
for i in range(20):
lat, lon = self.get_loc(datetime.now() + timedelta(0, i * 300))
self.mmlayer.add_widget(MapMarker(lat=lat,
lon=lon,
source=self.path_icon))
# Update the flag so we know when next update should be run
self.last_path_update = self.utcnow()
# Add the layer and call the reposition function otherwise the
# markers don't show otherwise!
self.map.add_layer(self.mmlayer)
self.mmlayer.reposition()
def get_TLE(self):
# Set some flags
need_update = False
# Set our data source and the name of the object we're tracking
source = "http://www.celestrak.com/NORAD/elements/stations.txt"
ISS = "ISS (ZARYA)"
# Get the current time
utc_now = self.utcnow()
# Set the name of our file to store data
data = os.path.join(self.path, "iss_tle.json")
# Try loading old data
try:
with open(data, "r") as savefile:
saved = json.load(savefile)
# If we can't create a dummy dict
except IOError:
saved = {"updated": 0}
# If old data is more than an hour hold, let's check for an update
if utc_now - saved["updated"] > 3600:
need_update = True
# If we don't have any TLE data then we need an update
if not saved.get("tle"):
need_update = True
if need_update:
# Load the TLE data
raw = requests.get(source).text
# Split the data into a neat list
all_sats = [sat.strip() for sat in raw.split("\n")]
# Find the ISS and grab the whole TLE (three lines)
iss_index = all_sats.index(ISS)
iss_tle = all_sats[iss_index:iss_index + 3]
# Prepare a dict to save our data
new_tle = {"updated": utc_now,
"tle": iss_tle}
# Save it
with open(data, "w") as savefile:
json.dump(new_tle, savefile, indent=4)
# ephem needs strings not unicode
return [str(x) for x in iss_tle]
else:
# return the saved data (as strings)
return [str(x) for x in saved["tle"]]
def update(self, *args):
# Update the ISS with newest TLE
self.iss = ephem.readtle(*self.get_TLE())
# Get the position and update marker
lat, lon = self.get_loc()
self.marker.lat = lat
self.marker.lon = lon
self.map.remove_widget(self.marker)
self.map.add_widget(self.marker)
# Check if the path needs redrawing
self.draw_iss_path()
def get_loc(self, dt=None):
# We can get the location for a specific time as well
if dt is None:
self.iss.compute()
else:
self.iss.compute(dt)
# Convert the ephem data into something that the map can use
lat = float(self.iss.sublat / ephem.degree)
lon = float(self.iss.sublong / ephem.degree)
return lat, lon
