The first step to using geospatial methods is to ask whether the evaluation involves looking at changes that can be analyzed through satellite data. The availability of accurate location information on project sites is crucial as well.
Along with assessing the suitability of using remotely sensed data, the evaluation team also has to identify the relevant satellite-based indicators or proxy indicators for capturing change. That will help estimate costs, and to make decisions about using readily available products, which may be free or commercially available, or develop customized satellite data products.
Satellite data provide objective evidence on how and where; however for causal and explanatory information (the ‘why’), the findings should be triangulated with other sources of information. When field validation becomes challenging, expert opinions, literature review, news reports, telephone interviews, social media or geographic platforms such as OpenStreetMap for crowdsourcing data can be utilized.
Evaluation offices often are not accustomed to using geospatial methods and may not have in-house expertise, therefore, collaborating with universities or academic institutions, space agencies, and specialized firms will help reduce the cost and deliver high-quality evaluative evidence.
In evaluation, innovation might not be imperative during business as usual scenarios, but it could be an investment for difficult circumstances. Evaluation offices that have invested in innovations will be more resilient and prepared to deploy these methods within a short time frame. Under the current circumstances, some readily available user-friendly platforms can be explored – the Global Resource Watch, the Water Explorer, the UN Biodiversity Lab, and the Sentinel Hub, etc. For more enthusiastic evaluators the current situation could be an opportunity to expand geospatial skills through some popular massive open online courses (MOOCs).
We wish you a happy earth exploration..10..9..8….
Disclaimer: Views expressed here are those of the authors and do not necessarily reflect the opinion or position of their employers nor is this a promotion of the project discussed.