48 lidar

Visualizing LiDAR data in 3D with only one line of code

Uncomment the following line to install leafmap if needed.

In [1]:

# !pip install leafmap

# !pip install leafmap

In [2]:

# !pip install leafmap[lidar] open3d

# !pip install leafmap[lidar] open3d

In [3]:

import os
import leafmap

import os import leafmap

Download a sample LiDAR dataset from Google Drive. The zip file is 52.1 MB and the uncompressed LAS file is 109 MB.

In [4]:

url = 'https://github.com/giswqs/data/raw/main/lidar/madison.zip'
filename = 'madison.las'

url = 'https://github.com/giswqs/data/raw/main/lidar/madison.zip' filename = 'madison.las'

In [5]:

if not os.path.exists(filename):
    leafmap.download_file(url, 'madison.zip', unzip=True)

if not os.path.exists(filename): leafmap.download_file(url, 'madison.zip', unzip=True)

Downloading...
From: https://github.com/giswqs/data/raw/main/lidar/madison.zip
To: /home/runner/work/leafmap/leafmap/docs/notebooks/madison.zip
100%|██████████| 54.7M/54.7M [00:00<00:00, 115MB/s]

Extracting files...

Read the LiDAR data

In [6]:

las = leafmap.read_lidar(filename)

las = leafmap.read_lidar(filename)

The LAS header.

In [7]:

las.header

las.header

Out[7]:

<LasHeader(1.3, <PointFormat(1, 0 bytes of extra dims)>)>

The number of points.

In [8]:

las.header.point_count

las.header.point_count

Out[8]:

4068294

The list of features.

In [9]:

list(las.point_format.dimension_names)

list(las.point_format.dimension_names)

Out[9]:

['X',
 'Y',
 'Z',
 'intensity',
 'return_number',
 'number_of_returns',
 'scan_direction_flag',
 'edge_of_flight_line',
 'classification',
 'synthetic',
 'key_point',
 'withheld',
 'scan_angle_rank',
 'user_data',
 'point_source_id',
 'gps_time']

Inspect data.

In [10]:

las.X

las.X

Out[10]:

array([5324343, 5324296, 5323993, ..., 5784049, 5784359, 5784667],
      dtype=int32)

In [11]:

las.Y

las.Y

Out[11]:

array([8035264, 8035347, 8035296, ..., 7550110, 7550066, 7550026],
      dtype=int32)

In [12]:

las.Z

las.Z

Out[12]:

array([36696, 34835, 34826, ..., 36839, 36858, 36842], dtype=int32)

In [13]:

las.intensity

las.intensity

Out[13]:

array([ 9, 41, 24, ..., 87, 80, 95], dtype=uint16)

Visualize LiDAR data using the pyvista backend.

In [14]:

# leafmap.view_lidar(filename, cmap='terrain', backend='pyvista')

# leafmap.view_lidar(filename, cmap='terrain', backend='pyvista')

Visualize LiDAR data using the ipygany backend.

In [15]:

# leafmap.view_lidar(filename, backend='ipygany', background='white')

# leafmap.view_lidar(filename, backend='ipygany', background='white')

Visualize LiDAR data using the panel backend.

In [16]:

# leafmap.view_lidar(filename, cmap='terrain', backend='panel', background='white')

# leafmap.view_lidar(filename, cmap='terrain', backend='panel', background='white')

Visualize LiDAR data using the open3d backend.

In [17]:

# leafmap.view_lidar(filename, backend='open3d')

# leafmap.view_lidar(filename, backend='open3d')

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Last update: 2022-11-25
Created: 2021-03-10