I am new to QGIS. I am working on creating heat map of bird diversity(data downloaded from ebird.org). The issue I face is that how to differentiate between:
- There areas where data is not available (bird surveys haven't happened)
- Bird survey has happened but a particular bird species is absent at that area
When create a heatmap of the particular bird species with QGIS 3.2.3(windows), the map interprets both situations as same, which is not correct. In the image attached, the white areas are either with no data or places where there are no kingfishers found. I want to color code them differently.