Geographic Information Systems Asked by Gulf on December 7, 2020
I have a group of users counting objects in a satellite image. To keep viewing conditions the same I wish each user to have the same display (e.g., the same scale).
To do this, I have asked users to set the same scale when viewing the satellite image (e.g., 1:1,000) on their laptop. Despite this, the image display looks different between users. For some users, the image appears more “zoomed in” and for others more “zoomed out” compared to mine.
How can I ensure all users have the same scale when viewing a satellite image?
Technical Details:
Users have the same satellite image (0.5 m Worldview imagery) but different laptops and platforms (some users are using QGIS, others ArcGIS).
I would set the display scale of the worldview image at a very narrow window to display at 1:1000 (but do not allow it to draw any finer or coarser than that) using the scale range option in ArcGIS (Layer properties/General tab).
I think setting a common scale is your best option here - I don't see how you can match displays beyond that point.
Answered by Tim Assal on December 7, 2020
You could downsample the image to a coarser resolution, then tell everyone to zoom in as much as they want.
Answered by Jon on December 7, 2020
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