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Jean-Romain authored Aug 15, 2024
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Expand Up @@ -9,9 +9,11 @@ R package for Airborne LiDAR Data Manipulation and Visualization for Forestry Ap

The lidR package provides functions to read and write `.las` and `.laz` files, plot point clouds, compute metrics using an area-based approach, compute digital canopy models, thin LiDAR data, manage a collection of LAS/LAZ files, automatically extract ground inventories, process a collection of tiles using multicore processing, segment individual trees, classify points from geographic data, and provides other tools to manipulate LiDAR data in a research and development context.

:book: Read [the book](https://r-lidar.github.io/lidRbook/index.html) to get started with the lidR package. See changelogs on [NEW.md](https://github.com/r-lidar/lidR/blob/master/NEWS.md)
- 📖 Read [the book](https://r-lidar.github.io/lidRbook/index.html) to get started with the lidR package. See changelogs on [NEW.md](https://github.com/r-lidar/lidR/blob/master/NEWS.md)
- 💻 Install `lidR` from R with: `install.packages("lidR")`
- 💵 [Sponsor `lidR`](https://github.com/sponsors/Jean-Romain)

To cite the package use `citation()` from within R:
`lidR` has been cited by more than 1,000 scientific papers. To cite the package use `citation()` from within R:

```r
citation("lidR")
Expand Down Expand Up @@ -49,6 +51,8 @@ chm <- rasterize_canopy(las, 1, pitfree(thr, edg))
plot(chm)
```

<br>

### Read and display a catalog of las files

<img align="right" src="https://raw.githubusercontent.com/Jean-Romain/storage/master/README/catalog-plot_interactive.gif">
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From a `LAScatalog` object the user can (for example) extract some regions of interest (ROI) with `clip_roi()`. Using a catalog for the extraction of the ROI guarantees fast and memory-efficient clipping. `LAScatalog` objects allow many other manipulations that can be done with multicore processing.

<br>

### Individual tree segmentation

<img align="left" src="https://raw.githubusercontent.com/Jean-Romain/storage/master/README/its-rotating-tree-segmented.gif" margin-right="5px">
<img align="left" src="https://raw.githubusercontent.com/Jean-Romain/storage/master/README/its-rotating-tree-segmented.gif">

The `segment_trees()` function has several algorithms from the literature for individual tree segmentation, based either on the digital canopy model or on the point-cloud. Each algorithm has been coded from the source article to be as close as possible to what was written in the peer-reviewed papers. Our goal is to make published algorithms usable, testable and comparable.

Expand Down Expand Up @@ -111,10 +117,12 @@ plot(las, color = "Amplitude", add = x)

# About

**lidR** is developed openly at [Laval University](https://www.ulaval.ca/en).
**lidR** is developed openly by [r-lidar](https://www.r-lidar.com/).

* Development of the `lidR` package between 2015 and 2018 was made possible thanks to the financial support of the [AWARE project (NSERC CRDPJ 462973-14)](https://awareproject.ca/); grantee [Prof Nicholas Coops](https://forestry.ubc.ca/faculty-profile/nicholas-coops/).
* Development of the `lidR` package between 2018 and 2021 was made possible thanks to the financial support of the [Ministère des Ressources naturelles et des Forêts](https://www.quebec.ca/en/government/ministere/ressources-naturelles-forets).
The development of the `lidR` package was made possible in the past thanks to the financial support of:
* 2015-2018: the [AWARE project (NSERC CRDPJ 462973-14)](https://awareproject.ca/); grantee [Prof Nicholas Coops](https://forestry.ubc.ca/faculty-profile/nicholas-coops/).
* 2018-2021: the [Ministère des Ressources naturelles et des Forêts](https://www.quebec.ca/en/government/ministere/ressources-naturelles-forets).
* 2021-2024: the [Laval University](https://www.ulaval.ca/en).

<img src="https://raw.githubusercontent.com/Jean-Romain/storage/master/README/logos.svg" width="600" align="center">

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