Filled Area on Maps in F#
How to make an area on Map F# with Plotly.
In [1]:
#r "nuget: Plotly.NET,2.0.0-preview.8"
#r "nuget: Plotly.NET.Interactive,2.0.0-preview.8"
Mapbox Access Token and Base Map Configuration¶
To plot on Mapbox maps with Plotly you may need a Mapbox account and a public Mapbox Access Token.
There are three different ways to show a filled area in a Mapbox map:
- Use a Scattermapbox trace and set fill attribute to 'ToSelf'
- Use a Mapbox layout (i.e. by minimally using an empty Scattermapbox trace) and add a GeoJSON layer
- Use the Choroplethmapbox trace type
Filled Scattermapbox Trace¶
The following example uses Scattermapbox and sets fill = 'ToSelf'
In [2]:
open Plotly.NET
open Plotly.NET.LayoutObjects
Chart.ScatterMapbox(
longitudes = [ -74; -70; -70; -74 ],
latitudes = [ 47; 47; 45; 45 ],
Fill = StyleParam.Fill.ToSelf,
mode = StyleParam.Mode.Lines_Markers
)
|> Chart.withMarkerStyle (Size = 10, Color = Color.fromString "orange")
|> Chart.withMarginSize (Left = 0, Right = 0, Top = 0, Bottom = 0)
|> Chart.withMapbox (Mapbox.init (Center = (-73., 46.), Style = StyleParam.MapboxStyle.StamenTerrain, Zoom = 5.))
Out[2]:
Multiple Filled Areas with a Scattermapbox trace¶
The following example shows how to use NaN in your data to draw multiple filled areas. Such gaps in trace data are unconnected by default, but this can be controlled via the connectgaps attribute.
In [3]:
open Plotly.NET
open Plotly.NET.LayoutObjects
Chart.ScatterMapbox(
longitudes = [ -10.; -10.; 8.; 8.; -10.; Double.NaN; 30.; 30.; 50.; 50.; 30.; Double.NaN; 100.; 100.; 80.; 80.; 100. ],
latitudes = [ 30.; 6.; 6.; 30.; 30.; Double.NaN; 20.; 30.; 30.; 20.; 20.; Double.NaN; 40.; 50.; 50.; 40.; 40.],
Fill = StyleParam.Fill.ToSelf,
mode = StyleParam.Mode.Lines_Markers
)
|> Chart.withMarginSize (Left = 0, Right = 0, Top = 0, Bottom = 0)
|> Chart.withMapbox (Mapbox.init (Center = (30., 30.), Style = StyleParam.MapboxStyle.StamenTerrain, Zoom = 2.))
Out[3]:
GeoJSON Layers¶
In this map we add a GeoJSON layer.
In [4]:
open Plotly.NET
open Plotly.NET.LayoutObjects
let coorindates = [(-73.606352888, 45.507489991); (-73.606133883, 45.50687600);
(-73.605905904, 45.506773980); (-73.603533905, 45.505698946);
(-73.602475870, 45.506856969); (-73.600031904, 45.505696003);
(-73.599379992, 45.505389066); (-73.599119902, 45.505632008);
(-73.598896977, 45.505514039); (-73.598783894, 45.505617001);
(-73.591308727, 45.516246185); (-73.591380782, 45.516280145);
(-73.596778656, 45.518690062); (-73.602796770, 45.521348046);
(-73.612239983, 45.525564037); (-73.612422919, 45.525642061);
(-73.617229085, 45.527751983); (-73.617279234, 45.527774160);
(-73.617304713, 45.527741334); (-73.617492052, 45.527498362);
(-73.617533258, 45.527512253); (-73.618074188, 45.526759105);
(-73.618271651, 45.526500673); (-73.618446320, 45.526287943);
(-73.618968507, 45.525698560); (-73.619388002, 45.525216750);
(-73.619532966, 45.525064183); (-73.619686662, 45.524889290);
(-73.619787038, 45.524770086); (-73.619925742, 45.524584939);
(-73.619954486, 45.524557690); (-73.620122362, 45.524377961);
(-73.620201713, 45.524298907); (-73.620775593, 45.523650879)]
let layers =
MapboxLayer.init (
SourceType = StyleParam.MapboxLayerSourceType.Vector,
Type = StyleParam.MapboxLayerType.Fill,
Coordinates = coorindates,
Below = "traces",
Color = Color.fromString "royalblue"
)
let mapBox =
Mapbox.init (
Center = (-73.605, 45.51),
Style = StyleParam.MapboxStyle.StamenTerrain,
Zoom = 12.,
Layers = [ layers ]
)
Chart.ScatterMapbox(longitudes = [ -73.605 ], latitudes = [ 45.51 ], mode = StyleParam.Mode.Markers)
|> Chart.withMarkerStyle (Size = 20, Color = Color.fromString "cyan")
|> Chart.withMarginSize (Left = 0, Right = 0, Top = 0, Bottom = 0)
|> Chart.withMapbox mapBox
Out[4]: