We had an interesting problem. How to create a map with
SECOORA's
assets showing all the buoys,
gliders, HF-radars, and land stations as an interactive map?
To accomplish that we had to use a specific folium
PR
,
that will be part of the next release, with the new custom icon class.
This new class allow users to display custom images as icons instead of the default markers.
Here is how to do it. First we instantiate the map:
zoom_start
=
5
mapa
=
folium
.
Map
(
location
=
[
lat
,
lon
],
tiles
=
"Cartodb Positron"
,
zoom_start
=
zoom_start
)
for
feature
in
stations
[
'features'
]:
lon
,
lat
=
feature
[
'geometry'
][
'coordinates'
]
icon_url
=
feature
[
'properties'
][
'icon'
]
popup
=
feature
[
'properties'
][
'popupcontent'
]
icon
=
folium
.
features
.
CustomIcon
(
icon_url
,
icon_size
=
(
14
,
14
))
marker
=
folium
.
map
.
Marker
([
lat
,
lon
],
icon
=
icon
,
popup
=
folium
.
map
.
Popup
(
popup
))
mapa
.
add_children
(
marker
)
And now do the same thing, but for the HF-radar GeoJSON.
Note that in this case we also have a
Polygon
feature in there.
The polygon represents the radar range radius.
We are trowing away the polygon styling though.
The style information is coded according the
simplestyle-spec
.
We do
plan to use
simplestyle-spec styling options soon.
style_function = lambda feature: dict(fillColor='#DEFFDE',
color='#AECCAE',
weight=1,
opacity=1)
for feature in hfradar['features']:
if feature['geometry']['type'] == 'Point':
lon, lat = feature['geometry']['coordinates']
icon_url = feature['properties']['icon']
popup = feature['properties']['popupcontent']
icon = folium.features.CustomIcon(icon_url,
icon_size=(14, 14))
marker = folium.Marker([lat, lon], icon=icon,
popup=folium.Popup(popup))
mapa.add_children(marker)
elif feature['geometry']['type'] == 'Polygon':
gjson = folium.features.GeoJson(feature, style_function=style_function)
mapa.add_children(gjson)
This post was written as an IPython notebook.
It is available for download
or as a static html.
python4oceanographers by Filipe Fernandes is
licensed under a Creative Commons
Attribution-ShareAlike 4.0 International License.
Based on a work at https://ocefpaf.github.io/.
