Advertisements
Advertisements
प्रश्न
What is an overlay analysis?
Answer the following question in about 30 words:
What is an overlay analysis?
दीर्घउत्तर
अति संक्षिप्त उत्तर
Advertisements
उत्तर
Overlay Analysis Operations is the hallmark of GIS. The integration of multiple layers of maps using overlay operations is an important analysis function. In other words, GIS makes it possible to overlay two or more thematic layers of maps of the same area to obtain a new map layer, similar to sieve mapping, i.e., overlaying traced maps on a light table to make comparisons and obtain an output map.
Overlay Opeartion: x + y = z
Where,
x = Road map
y = Rail map
z = Transport map
+ = The spatial overlay operation ‘union’
Geographical representation:
 |
+ |  |
= |  |
| Road map | Rail map | Transport map |
shaalaa.com
Sequences of GIS Activities
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
