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Labeling Geospatial data

Navigate the image

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Tiles are dynamically loaded from the image source, so loading time may vary based on several factors. Multi-band images typically require more time to render, and slower network connections or greater physical distance from the image storage location can increase tile loading time in the interface.

You can navigate the image using several tools:

  • Pan: Click and drag to move around the image.
  • Zoom
    • Use your mouse scroll wheel or trackpad to zoom in and out.
    • Adjust zoom levels directly from the header or by using the + and - keys
    • Press Shift+ 1 to go back to the initial zoom level
    • Or, hold the Shift key and draw a box around the area you want to zoom into for a quick focus.
  • Mini-Map
    A mini-map in the corner of the interface shows your current viewport. You can drag the viewport box to quickly jump to a different part of the image. You can hide/show it from the display settings.
  • Jump to object
    From the Job viewer, you can click on a specific annotation or object in the list. The interface will automatically pan and zoom to its exact location on the image

Customizing image display settings

Rescale image bands

Adjust the minimum and maximum values used to render each band. This helps enhance contrast and visibility of specific features.
By default, the viewer uses the 2nd to 98th percentile of pixel values for rescaling. You can view the histogram of each band to guide your adjustments.

Create RGB composites

When working with multispectral or hyperspectral imagery, you can map any available bands to Red, Green, and Blue channels to generate a custom composite.
This is useful for creating true-color or false-color views, depending on your analysis needs.

Create spectral indices

Define custom band math expressions to compute spectral indices such as NDVI, NDWI, or any other relevant formula.
You can then apply a colormap to better highlight the index values and identify patterns or anomalies in the imagery.

Rotate the image

You can use the rotation button to adjust the orientation of geospatial images. With each click, the image rotates by 10 degrees. Alternatively, you can enter the desired rotation angle directly into the input field for more precise adjustments. If you need to reset the rotation to its original orientation, simply double-click the rotation button.

Spatial tools for precision labeling

Find location by coordinates

Quickly locate a specific point in the image by right-clicking and selecting “Find location,” then entering latitude and longitude.

Copying coordinates

You can quickly copy the geo-coordinates of any point. To do that, hover over it, click the right mouse button, and then select Copy GPS Coordinates. The coordinates are copied to the clipboard.

Measuring distances

You can measure distances between any two points. The distance is provided in meters and feet. This is helpful in situations when an object’s length is a decisive factor for assigning it a specific class.

Annotate the image

Geospatial projects support a wide range of annotation tools to match your labeling needs: