landpatch

KO | EN

gitlite — search

#python #java #python3 #arduino #golang #machine-learning #rust #html #flask #javascript #seismology #nodejs

★ 12 Open GitHub ↗

a visualization of landsat collection paths through the northern hemisphere

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

# landpatch

![](https://farm4.staticflickr.com/3762/13562203935_1be00d8dbf_o.jpg)

Code for downloading & visualizing [Landsat 8](http://www.nasa.gov/mission_pages/landsat/main/) raster
images.

## collection

This plays against two different APIs for the same thing: Google does a mirror
of Landsat 8 imagery that you can access with [gsutil](https://developers.google.com/storage/docs/gsutil):

```
gsutil ls -R "gs://earthengine-public/landsat/L8/**" > scenes-recursive
```

This just lists and dumps all of the URLs, which include IDs.

Then you can download them with `collect-web.js`, which is a nodejs script
that scrapes metadata from nasa.gov and then downloads, resizes, and tweaks
thumbnail images. This process avoids touching the huge raw GeoTIFF images
in favor of thumbnails.

Then `meta.js` generates a big file that just lists all of the available images.
The image filenames are chosen to expose metadata - they include the bounding
box & collection date of each image.

## display

Then, the web interface is simple - a basic equirectangular projection implemented
with 'just Canvas', using [momentjs](http://momentjs.com/) for time parsing.

## troubleshooting

This code requires a high ulimit value. If you run into an EMFILE error, [try increasing your ulimit](https://encrypted.google.com/search?hl=en&q=stackoverflow%20increase%20ulimit).

landpatch

Explore Similar Repositories

Was this content helpful?

Recent Feedback

Download README