Thresholds of homogeneity in targets in the landscape. Relationship with remote sensing
Christian Puech · International Journal of Remote Sensing · 1994
In the Sahelian context, features making up the landscape arc a mixture of intermittent elements which can be described not by a single qualitative characteristic but by a range of complementary and, more often, quantitative characteristics. The position of elements in the landscape means that their perception poses problems of significance when using remote sensing qualitative imagery with a fixed sampling pace'. Here, we indicate how, in our opinion, each target in the environment is defined in relation to two perceptional thresholds, the first one separating from groups of elements of an inferior level, the second one from groups of a superior level. We can, therefore, imagine a piling up of levels. The resolution of satellite imagery must, therefore, be compared with the two limits of eaeh target. In this way, we can ascertain if it is possible to observe it with such an image and how to do it.