I'm working on a mapping application. For a feature, we'd like users to have the ability to cross reference a few of our datasets. Initially, I was just displaying the overlapping area from the selected datasets, but this loses a lot of finer grain details. I'd like to display the individual datasets, if possible.
My concerns are that it can be difficult to differentiate datasets that overlap very closely, and without color vision it can be very difficult to parse this image.
How should I tackle this issue while still providing at least some of this powerful functionality to the user?
The datasets I'm working with are all based around the Great Lakes area and relate to biological and geographical data. To simplify things (both for processing and preparing the data), we're just looking at Lake Erie as this feature is still under development. Here's some sample data: https://arcgis.lsa.umich.edu/arcgis/rest/services/IFR/glahf_dss_le_cdd/MapServer?f=jsapi https://arcgis.lsa.umich.edu/arcgis/rest/services/IFR/glahf_dss_le_circulation_magnitude/MapServer?f=jsapi