What kind of projection does Google Earth use?

What kind of projection does Google Earth use?

// The input image has a SR-ORG:6974 (sinusoidal) projection. // Normalize the image and add it to the map. The order of operations for this code sample is diagrammed in Figure 1. Note that the projection of the input is determined by the output, specifically the maps mercator projection of the map display in the Code Editor.

How to obtain coordinates and corresponding pixel values?

There was a similar question here about obtaining lat/long coordinates from tiff (Obtain Latitude and Longitude from a GeoTIFF File) and the answer showed how to obtain only top left x and y pixel coordinates. I need to obtain ALL projected pixel coordinates as well as get the pixel values and save them in a numpy array. How can I do it?

How is output determined in Google Earth Engine?

Specifically, inputs are requested in the output projection. The output may be determined from a function parameter (e.g. crs ), the Map in the Code Editor (which has a maps mercator (EPSG:3857) projection), or with a reproject () call.

What is the native resolution of Google Earth?

The native resolution is the nominal pixel scale in meters of the lowest level of the image pyramid. Because each band of an image can have a different scale and/or projection, if you call projection () on an image with at least one band that doesn’t have the same projection as the others, you may see an error like:

Why is my projection invalid in Earth Engine?

If you try to use an image like this in a computation, you may see an error like: The default WGS84 projection is invalid for aggregations. Specify a scale or crs & crs_transform. Generally, an aggregation at 1-degree scale is not desired or intended, so Earth Engine gives this friendly reminder to provide a complete specification for the output.

What happens when you call projection on an image?

Because each band of an image can have a different scale and/or projection, if you call projection () on an image with at least one band that doesn’t have the same projection as the others, you may see an error like: Image.projection: The bands of the specified image contain different projections. Use Image.select to pick a single band.

What does it mean to georectify an image?

Georectify: To take an image that has not been adjusted to be in a known coordinate system, and put it into a known coordinate system. Usually this means taking an image that is in its original geometry, and putting it into a map projection.

How is georectification used in a spatial grid?

Georectification is the process of taking an image of a map and referencing it to a spatial grid, so that the image of the map can be used as a layer in other maps, or so that the image of the map can in turn be used for associating points of interest with the spatial grid.

How to create a map using Mercator projection?

This example creates a map using the Gall-Peters projection, rather than the default Mercator projection. Read the documentation. // projection. // Create a map. Use the Gall-Peters map type.

Is it a problem to have no projection?

In the vast majority of use cases, having no projection is not a problem and is actually a valuable optimization, as it allows previewing the results at any zoom level without having to wait for the full resolution computation to complete. But it does mean that the output can appear different at different zoom levels.

How is the output of maps Mercator determined?

The output may be determined from a function parameter (e.g. crs ), the Map in the Code Editor (which has a maps mercator (EPSG:3857) projection), or with a reproject () call. When you display images in the Code Editor, inputs are requested in maps mercator.

Which is the sinusoidal projection in MODIS image?

Consider the following simple operation on a MODIS image, which has a sinusoidal projection: // The input image has a SR-ORG:6974 (sinusoidal) projection. // Normalize the image and add it to the map. The order of operations for this code sample is diagrammed in Figure 1.

How to determine the native resolution of a projection?

Note that by calling nominalScale () on the ee.Projection returned by projection (), you can determine the native resolution of the image. The native resolution is the nominal pixel scale in meters of the lowest level of the image pyramid.