Table 1. Source and relevant information associated with the images used in analyses.
| Set of images | Source | Additional information |
|---|---|---|
| 1947 | Images scanned and provided by IGN archive. | Aerial photographs taken by USAF in 1947 (majority) and 1948. |
| 1960 | Images scanned and provided by IGN archive. | Aerial photographs taken in March 1960 by USAF at 30,000 feet. |
| 1980 | Images scanned and provided by IGN archive. | Aerial photographs taken in January 1980 at 6,000 feet. |
| 1997 | Misión TERRA aerial photographs. | Aerial photographs taken between November 1997 and January 1999 by Hauts Monts Inc. for MINAE/RECOPE; scale 1:40,000. Orthorectified using Google Earth imagery, IGN 1:50,000 and CENIGA 1:25,000 cartographic sheets. |
| 2005 | Misión CARTA imagery. | Orthophotographs; scale 1:5,000. Accessed through SNIT WMS. |
| 2014 | Google Earth high resolution imagery. | Satellite imagery taken 31 December 2013, 1 February 2014*, and 31 March 2014; accessed May 2014 and September 2015. Images by CNES/Astrium. |
* Most of the area of interest was captured on this date
CENIGA: Centro Nacional de Información Geoambiental (Costa Rica)
CNES: Centre National d’Etudes Spatiales (France)
IGN: Instituto Geográfico Nacional (Costa Rica)
MINAE: Ministerio de Ambiente y Energía (Costa Rica)
RECOPE: Refinadora Costarricense de Petróleo (Costa Rica)
SNIT: Sistema Nacional de Información Territorial (Costa Rica)
USAF: United States Air Force
WMS: Web Mapping Service