How to filter data in Google Earth visualization?
Filter an image collection to include only relevant data that supports the purpose of the visualization. Consider dates, spatial extent, quality, and other properties specific to a given dataset. For instance, filter a Sentinel-2 surface reflectance collection by: or an image property. Chain multiple filters.
How to map an imagecollection in Google Earth?
For example: // Load a Landsat 8 collection for a single path-row. // the solar elevation > 40 degrees. Otherwise it returns a zero image. // Map the function over the collection, convert to a List and print the result.
How to filter and sort images in Google Earth?
Filter, composite, sort, and style images within a collection to display only those of interest or emphasize a phenomenon.
Do you use filters in Google Earth Engine?
Although this demonstrates a server-side conditional function (learn more about client vs. server in Earth Engine on this page ), avoid If () in general and use filters instead.
How to create imagecollection in Google Earth Engine?
Suppose your region of interest spans two Landsat rows within the same path and your objective is to display an image mosaic of the two images for each Landsat 8 orbit in 2017 and 2018. Here, after filtering the collection by path and row, a join operation is used to mosaic Landsat images from the same obit, defined by acquisition date.
How is the join operation used in Google Earth?
Here, after filtering the collection by path and row, a join operation is used to mosaic Landsat images from the same obit, defined by acquisition date. Sort a collection by time to ensure proper chronological sequence, or order by a property of your choice.
How to make time lapse imagery with Google Earth Engine?
Almost a year ago I wrote a post on building time-lapse imagery with Google Earth Engine. It shows how to process the Landsat 8 top of atmosphere collection into an mp4 format. It talks about choosing the path and row and filtering on clouds, selecting the bands and converting to 8 bit imagery.
Where can I find Landsat data in Earth Engine?
Landsat data is available in Earth Engine in its raw form, as Surface Reflectance, TOA-corrected reflectance, and in various ready-to-use computed products such as NDVI and EVI vegetation indices.