Reclassify Slope in Google Earth Engine using DEM

[@spritualchannel2779]

Thank u brother, it uses me a lot

[@varampornwongworapath4353]

Hi kapil, Can you teach me how to convert DEM data to terrain analysis data?
I would like to know if GEE can be used in place of SAGA?
Thanks again for sharing your expertise in this matter.

[@KapildevAdhikari]

Sure

[@KapildevAdhikari]

There are two methods to terrain analysis in GEE,
1st method:
// A digital elevation model. // use NASA, USGS/SRTM, or ASTER dem product//
var dem = ee.Image('NASA/NASADEM_HGT/001').select('elevation');
// Calculate slope. Units are degrees, range is [0,90).
var slope = ee.Terrain.slope(dem);
// Calculate aspect. Units are degrees where 0=N, 90=E, 180=S, 270=W.
var aspect = ee.Terrain.aspect(dem);
// Display slope and aspect layers on the map.
Map.setCenter(-123.457, 47.815, 11);
Map.addLayer(slope, {min: 0, max: 89.99}, 'Slope');
Map.addLayer(aspect, {min: 0, max: 359.99}, 'Aspect');
2nd direct method:
// Use the ee.Terrain.products function to calculate slope, aspect, and
// hillshade simultaneously. The output bands are appended to the input image.
// Hillshade is calculated based on illumination azimuth=270, elevation=45.
var terrain = ee.Terrain.products(dem);
print('ee.Terrain.products bands', terrain.bandNames());
Map.addLayer(terrain.select('hillshade'), {min: 0, max: 255}, 'Hillshade');
//obtain and display ‘slope’, ‘aspect’ same as Hillshade.
To export the terrain data to google drive:
// A digital elevation model.
var dem = ee.Image('NASA/NASADEM_HGT/001').select('elevation');
var terrain = ee.Terrain.products(dem);
// Define the region of interest as a geometry.
// var roi =
// Export the terrain data to Google Drive.
Export.image.toDrive({
image: terrain,
description: 'terrain_data',
scale: 90, // Adjust the scale to your needs.
region: roi,
folder: 'your_export_folder', // Specify your export folder.
maxPixels: 1e13 // You may need to adjust this value based on your image.
});

[@varampornwongworapath4353]

@@KapildevAdhikari thank you very much 🙏🏻🙏🏻🙏🏻🙏🏻

[@shanhong2341]

hi, how or where do i find the Vietnam data if my site is at vietnam?

[@KapildevAdhikari]

You can find dem data of anywhere in GEE

[@Hedieh7547]

hello,
do you have soiltexture code
i really need
can you help me please

[@KapildevAdhikari]

DM at [e-mail]

[@boi_ratie]

Hi Kapil, could you please help with calculating a time series of LST (Land Surface Temperature ) for a period of 15 years ? in GEE

[@KapildevAdhikari]

Ok

[@boi_ratie]

Please provide me with your email if you don’t mind. I have a few questions and i think you might be able to help me.

[@KapildevAdhikari]

@@boi_ratie [e-mail]