I am going to calculate least-cost paths toward a number of location, implementing Tobler's hiking function (i.e., considering slope as factor influencing speed of movement). I want to make sure that the paths will try to avoid some zones according to the land cover. The latter data is available as raster dataset.
Is it sound to reclassify the land cover types assigning a high value to the land-cover type I want the least-cost paths to avoid, and then multiplying the SLOPE by the reclassified LAND-COVER raster?
If it is ok, how should I proceed in case I want the paths to also avoid urban areas?