Community Research and Development Information Service - CORDIS


Remote sensing can contribute in several ways to land use or land cover area estimation. We analyse some possible ways in which this contribution can be carried out:

- Improving the sampling design of a ground survey. This can be achieved through stratification by photo-interpretation, partial stratification in a two-phase segment sampling or assessing land cover spatial correlation, in order to optimise the size of the sampling units;
- Reducing the amount of ground survey work. Excluding non cropped points (or segments) from ground visits. Using classified images as co-variables. Several approaches are possible including regression estimator and different types of calibration estimates;
- Collecting basic information for area estimation (by photo-interpretation, automatic classification). This is to be used very cautiously, because pixel counting generally leads to biased estimates.

Additional information

Authors: GALLEGO F J, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Colloque Francophone sur les sondages, Rennes (FR), June 19-20, 1997
Availability: Available from (1) as Paper FR 41115 ORA
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