I´m currently conducting a suitability analysis with the weighted overlay function. One relevant criteria is the proximity to highways. If the wind turbine is located up to 300 m away from the highway, the cell gets 10 points (out of 10). If it is farther away,the cell shouldn´t get a score, because the criteria is not relevant. So I ran the "euclidean distance" function with a maximum distance of 300 m. All cells farther away than 300 m are declared as "nodata". Then I ran the "weighted overlay" function with 3 more criteria (all have the same weights). The problem is that the study area is bigger than the 300 m buffer around the highways, but after I ran the "weighted overlay" function, only the area within the 300 m buffer was weighted. The rest of the study area was declared as "nodata". The goal is that, when conducting the weighted overlay function, a cell farther away than 300m is not influenced by the criteria "proximity to highway".
example: There are 4 criteria with equal importance. C4 is the "proximity to highways" criteria. A cell within the 300 m radius should be calculated like this: c1: 8 points (25%), c2: 6 points (25%), c3 4 points (25%) and C4: 10 points (25%) --> weight: (8+6+4+10)/4 = 7 points A cell outside of the 300m radius should be calculated like this: c1: 8 points (25%), c2: 6 points (25%), c3 4 points (25%) and C4: no input (25%) --> weight: (8+6+4)/3 = 6 points
Is this possible? I don´t want to give the "nodata" cells a scale value.
Thanks for you help!