06 legend

Adding custom legends to the map

Uncomment the following line to install leafmap if needed.

In [1]:

# !pip install leafmap

# !pip install leafmap

In [2]:

import leafmap

import leafmap

List available built-in legends.

In [3]:

legends = leafmap.builtin_legends
for legend in legends:
    print(legend)

legends = leafmap.builtin_legends for legend in legends: print(legend)

NLCD
NWI
MODIS/051/MCD12Q1
GLOBCOVER
JAXA/PALSAR
MODIS/006/MCD12Q1
Oxford
AAFC/ACI
COPERNICUS/CORINE/V20/100m
COPERNICUS/Landcover/100m/Proba-V/Global
USDA/NASS/CDL
ESA_WorldCover

National Land Cover Database (NLCD)

https://developers.google.com/earth-engine/datasets/catalog/USGS_NLCD

Create an interactive map.

In [4]:

Map = leafmap.Map()

Map = leafmap.Map()

Add a WMS layer and built-in legend to the map.

In [5]:

url = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2016_Land_Cover_L48/wms?"
Map.add_wms_layer(
    url,
    layers="NLCD_2016_Land_Cover_L48",
    name="NLCD 2016 CONUS Land Cover",
    format="image/png",
    transparent=True,
)
Map.add_legend(builtin_legend='NLCD')

Map

url = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2016_Land_Cover_L48/wms?" Map.add_wms_layer( url, layers="NLCD_2016_Land_Cover_L48", name="NLCD 2016 CONUS Land Cover", format="image/png", transparent=True, ) Map.add_legend(builtin_legend='NLCD') Map

Out[5]:

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Add National Wetlands Inventory to the map.

In [6]:

Map = leafmap.Map(google_map="HYBRID")

url1 = "https://www.fws.gov/wetlands/arcgis/services/Wetlands/MapServer/WMSServer?"
Map.add_wms_layer(
    url1, layers="1", format='image/png', transparent=True, name="NWI Wetlands Vector"
)

url2 = "https://www.fws.gov/wetlands/arcgis/services/Wetlands_Raster/ImageServer/WMSServer?"
Map.add_wms_layer(
    url2, layers="0", format='image/png', transparent=True, name="NWI Wetlands Raster"
)

Map.add_legend(builtin_legend="NWI")
Map

Map = leafmap.Map(google_map="HYBRID") url1 = "https://www.fws.gov/wetlands/arcgis/services/Wetlands/MapServer/WMSServer?" Map.add_wms_layer( url1, layers="1", format='image/png', transparent=True, name="NWI Wetlands Vector" ) url2 = "https://www.fws.gov/wetlands/arcgis/services/Wetlands_Raster/ImageServer/WMSServer?" Map.add_wms_layer( url2, layers="0", format='image/png', transparent=True, name="NWI Wetlands Raster" ) Map.add_legend(builtin_legend="NWI") Map

Out[6]:

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Add custom legends

There are two ways you can add custom legends:

1. Define legend labels and colors
2. Define legend dictionary

Define legend keys and colors

In [7]:

Map = leafmap.Map()

labels = ['One', 'Two', 'Three', 'Four', 'ect']
# color can be defined using either hex code or RGB (0-255, 0-255, 0-255)
colors = ['#8DD3C7', '#FFFFB3', '#BEBADA', '#FB8072', '#80B1D3']
# colors = [(255, 0, 0), (127, 255, 0), (127, 18, 25), (36, 70, 180), (96, 68, 123)]

Map.add_legend(title='Legend', labels=labels, colors=colors)
Map

Map = leafmap.Map() labels = ['One', 'Two', 'Three', 'Four', 'ect'] # color can be defined using either hex code or RGB (0-255, 0-255, 0-255) colors = ['#8DD3C7', '#FFFFB3', '#BEBADA', '#FB8072', '#80B1D3'] # colors = [(255, 0, 0), (127, 255, 0), (127, 18, 25), (36, 70, 180), (96, 68, 123)] Map.add_legend(title='Legend', labels=labels, colors=colors) Map

Out[7]:

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Define a legend dictionary.

In [8]:

Map = leafmap.Map()

url = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2016_Land_Cover_L48/wms?"
Map.add_wms_layer(
    url,
    layers="NLCD_2016_Land_Cover_L48",
    name="NLCD 2016 CONUS Land Cover",
    format="image/png",
    transparent=True,
)

legend_dict = {
    '11 Open Water': '466b9f',
    '12 Perennial Ice/Snow': 'd1def8',
    '21 Developed, Open Space': 'dec5c5',
    '22 Developed, Low Intensity': 'd99282',
    '23 Developed, Medium Intensity': 'eb0000',
    '24 Developed High Intensity': 'ab0000',
    '31 Barren Land (Rock/Sand/Clay)': 'b3ac9f',
    '41 Deciduous Forest': '68ab5f',
    '42 Evergreen Forest': '1c5f2c',
    '43 Mixed Forest': 'b5c58f',
    '51 Dwarf Scrub': 'af963c',
    '52 Shrub/Scrub': 'ccb879',
    '71 Grassland/Herbaceous': 'dfdfc2',
    '72 Sedge/Herbaceous': 'd1d182',
    '73 Lichens': 'a3cc51',
    '74 Moss': '82ba9e',
    '81 Pasture/Hay': 'dcd939',
    '82 Cultivated Crops': 'ab6c28',
    '90 Woody Wetlands': 'b8d9eb',
    '95 Emergent Herbaceous Wetlands': '6c9fb8',
}

Map.add_legend(title="NLCD Land Cover Classification", legend_dict=legend_dict)
Map

Map = leafmap.Map() url = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2016_Land_Cover_L48/wms?" Map.add_wms_layer( url, layers="NLCD_2016_Land_Cover_L48", name="NLCD 2016 CONUS Land Cover", format="image/png", transparent=True, ) legend_dict = { '11 Open Water': '466b9f', '12 Perennial Ice/Snow': 'd1def8', '21 Developed, Open Space': 'dec5c5', '22 Developed, Low Intensity': 'd99282', '23 Developed, Medium Intensity': 'eb0000', '24 Developed High Intensity': 'ab0000', '31 Barren Land (Rock/Sand/Clay)': 'b3ac9f', '41 Deciduous Forest': '68ab5f', '42 Evergreen Forest': '1c5f2c', '43 Mixed Forest': 'b5c58f', '51 Dwarf Scrub': 'af963c', '52 Shrub/Scrub': 'ccb879', '71 Grassland/Herbaceous': 'dfdfc2', '72 Sedge/Herbaceous': 'd1d182', '73 Lichens': 'a3cc51', '74 Moss': '82ba9e', '81 Pasture/Hay': 'dcd939', '82 Cultivated Crops': 'ab6c28', '90 Woody Wetlands': 'b8d9eb', '95 Emergent Herbaceous Wetlands': '6c9fb8', } Map.add_legend(title="NLCD Land Cover Classification", legend_dict=legend_dict) Map

Out[8]:

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Last update: 2022-03-14