What do they mean when they say
Determine the area of the orthophoto map on the topographicql map
When they say "determine the area of the orthophoto map on the topographical map," they are asking to calculate the actual size or area of the orthophoto map displayed on the topographical map. Orthophoto maps are aerial or satellite images that have been corrected for distortions and transformed into a map with a consistent scale, while topographical maps show detailed terrain features like elevation, contour lines, and vegetation.
Calculating the area of the orthophoto map on the topographical map involves measuring the length and width of the orthophoto map within the borders or grid lines of the topographical map, and then multiplying these dimensions to determine the total area in square units (such as square meters or square kilometers). This information can be useful for understanding the scale and coverage of the orthophoto map in relation to the topographical features shown on the map.