#  [](https://www.npmjs.com/package/@thi.ng/pixel-io-geotiff)  [](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 205 standalone projects, maintained as part > of the [@thi.ng/umbrella](https://github.com/thi-ng/umbrella/) monorepo > and anti-framework. > > 🚀 Please help me to work full-time on these projects by [sponsoring me on > GitHub](https://github.com/sponsors/postspectacular). Thank you! ❤️ - [About](#about) - [Status](#status) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About GeoTIFF reader support for [@thi.ng/pixel](https://github.com/thi-ng/umbrella/tree/develop/packages/pixel).  This package is only intended to simplify obtaining DEM (elevation) data and not aimed at general [GeoTIFF](http://docs.opengeospatial.org/is/19-008r4/19-008r4.html) functionality. For the latter we recommend using the wrapped [geotiff.js](https://geotiffjs.github.io/) package directly. ## Status **STABLE** - used in production [Search or submit any issues for this package](https://github.com/thi-ng/umbrella/issues?q=%5Bpixel-io-geotiff%5D+in%3Atitle) ## Installation ```bash yarn add @thi.ng/pixel-io-geotiff ``` ESM import: ```ts import * as geo from "@thi.ng/pixel-io-geotiff"; ``` Browser ESM import: ```html ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const geo = await import("@thi.ng/pixel-io-geotiff"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 399 bytes ## Dependencies - [@thi.ng/api](https://github.com/thi-ng/umbrella/tree/develop/packages/api) - [@thi.ng/pixel](https://github.com/thi-ng/umbrella/tree/develop/packages/pixel) - [geotiff](https://github.com/geotiffjs/geotiff.js) Note: @thi.ng/api is in _most_ cases a type-only import (not used at runtime) ## API [Generated API docs](https://docs.thi.ng/umbrella/pixel-io-geotiff/) ```ts import { GRAY16 } from "@thi.ng/pixel"; import { readGeoTiff } from "@thi.ng/pixel-io-geotiff"; import { asPGM16 } from "@thi.ng/pixel-io-netpbm"; import { readFileSync } "node:fs"; // load GeoTIFF image and convert to thi.ng/pixel floatBuffer // the result image uses a custom pixel format (FLOAT_GRAY_RANGE, with [min..max] // set to the analyzed value range found in the source image raster...) const result = await readGeoTiff(readFileSync("USGS_1_n37w119_20211004.tif")); // { img: FloatBuffer { size: [ 3612, 3612 ], ... }, tiff: { ... } } // convert to 16bit PGM writeFileSync("n37w119.pgm", asPGM16(result.img.as(GRAY16))); // the result also contains the original TIFF image // (see 3rd party geotiff package for more details) result.tiff.getGDALMetadata(0); // { // LAYER_TYPE: '*', // RepresentationType: '*', // STATISTICS_MAXIMUM: '4412.8549804688', // STATISTICS_MEAN: '2114.5010480446', // STATISTICS_MINIMUM: '140.41374206543', // STATISTICS_STDDEV: '918.91201914189', // STATISTICS_VALID_PERCENT: '100' // } ``` ## Authors - [Karsten Schmidt](https://thi.ng) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-pixel-io-geotiff, title = "@thi.ng/pixel-io-geotiff", author = "Karsten Schmidt", note = "https://thi.ng/pixel-io-geotiff", year = 2023 } ``` ## License © 2023 - 2025 Karsten Schmidt // Apache License 2.0