Compare View is a fast and convenient way to compare time-series surveys and monitor for change over time, look for weak signals or report about a work-in-progress situation. Three kinds of Compare views are available:
- Overlay View
- Slide View
- Split View
From a project that contains at least 2 distinct surveys from the same geographical area of interest, select first Compare from the right panel in main view (NB : it will remain disabled - grayed - if the project has not enough data that can be compared)
This enables to select the surveys, layers and view mode.
1. Selecting the surveys and models to be compared
Select view mode, top layer, bottom layer, and the categories of layers to be compared from the existing layers in project (orthomaps, DSMs)
2. Overlay View
This mode overlays two layers (orthomaps, DSMs, NDVI) at same position. Visual examination of difference can be achieved by adjusting the Top Layer opacity from its slider bar:
3. Slide View
The Slide View allows to swipe between two layers side by side for the difference examination, which is particularly useful to check for absence/presence of items or examinate variations in the terrain surface from DSMs.
4. Split View
The Split View offers to compare the two layers side by side without overlaying.