05 load raster

Loading local raster datasets with leafmap

Uncomment the following line to install leafmap if needed.

In [1]:

# !pip install leafmap

# !pip install leafmap

To follow this tutorial, you need to install the leafmap and xarray_leaflet Python packages. Use the following conda commands to create a conda env and install packages. Note that xarray_leaflet does not work properly on Windows (source). Also, the add_raster function is only available for the ipyleaflet plotting backend. Therefore, Google Colab is not supported. Use the binder link above instead.

• conda create -n gee python
• conda activate gee
• conda install mamba -c conda-forge
• mamba install leafmap xarray_leaflet -c conda-forge

Use the ipyleaflet plotting backend. The folium plotting backend does not support the add_raster function.

In [2]:

import os
import leafmap.leafmap as leafmap

import os import leafmap.leafmap as leafmap

Specify input raster datasets

In [3]:

landsat = 'landsat.tif'
dem = 'dem.tif'

landsat = 'landsat.tif' dem = 'dem.tif'

Download samples raster datasets

More datasets can be downloaded from https://viewer.nationalmap.gov/basic/

In [4]:

landsat_url = (
    'https://drive.google.com/file/d/1EV38RjNxdwEozjc9m0FcO3LFgAoAX1Uw/view?usp=sharing'
)
leafmap.download_file(landsat_url, 'landsat.tif', unzip=False)

landsat_url = ( 'https://drive.google.com/file/d/1EV38RjNxdwEozjc9m0FcO3LFgAoAX1Uw/view?usp=sharing' ) leafmap.download_file(landsat_url, 'landsat.tif', unzip=False)

Downloading...
From: https://drive.google.com/uc?id=1EV38RjNxdwEozjc9m0FcO3LFgAoAX1Uw
To: /home/runner/work/leafmap/leafmap/docs/notebooks/landsat.tif
100%|██████████| 10.4M/10.4M [00:00<00:00, 81.7MB/s]

Out[4]:

'/home/runner/work/leafmap/leafmap/docs/notebooks/landsat.tif'

In [5]:

dem_url = (
    'https://drive.google.com/file/d/1vRkAWQYsLWCi6vcTMk8vLxoXMFbdMFn8/view?usp=sharing'
)
leafmap.download_file(dem_url, 'dem.tif', unzip=False)

dem_url = ( 'https://drive.google.com/file/d/1vRkAWQYsLWCi6vcTMk8vLxoXMFbdMFn8/view?usp=sharing' ) leafmap.download_file(dem_url, 'dem.tif', unzip=False)

Downloading...
From: https://drive.google.com/uc?id=1vRkAWQYsLWCi6vcTMk8vLxoXMFbdMFn8
To: /home/runner/work/leafmap/leafmap/docs/notebooks/dem.tif
100%|██████████| 15.2M/15.2M [00:00<00:00, 75.8MB/s]

Out[5]:

'/home/runner/work/leafmap/leafmap/docs/notebooks/dem.tif'

Create an interactive map

In [6]:

m = leafmap.Map()

m = leafmap.Map()

Add local raster datasets to the map

More colormap can be found at https://matplotlib.org/3.1.0/tutorials/colors/colormaps.html

In [7]:

m.add_raster(dem, colormap='terrain', layer_name='DEM')

m.add_raster(dem, colormap='terrain', layer_name='DEM')

In [8]:

m.add_raster(landsat, bands=[5, 4, 3], layer_name='Landsat')

m.add_raster(landsat, bands=[5, 4, 3], layer_name='Landsat')

Display the map

In [9]:

m

m

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Last update: 2023-04-05
Created: 2021-05-26