Question

Which of the following statements is/are correct?

1. (i) Remote sensing is a source of cartographic data
2. (ii) Digital databases allow easy updating
3. (iii) Cartographic data includes only spatial data

• A. i only
• B. ii, iii
• C. i, ii
• D. None of these

Answer 1

Answer:

C. i, ii

Remote sensing is one of the primary sources used to collect cartographic and geographic data. Sensors on satellites and aircraft capture electromagnetic radiation reflected or emitted from the Earth's surface, which is then processed into maps and digital models. Digital cartographic databases allow for efficient, rapid, and cost-effective updating of geographical information compared to traditional paper-based maps. Changes in terrain, infrastructure, or boundaries can be modified instantly. Cartographic and Geographic Information System (GIS) data does not consist of spatial data alone. It is broadly classified into two categories: Represents the geometry and geography of features (points, lines, polygons) defining their absolute location on Earth. Describes the characteristics, qualities, or properties of these spatial features (e.g., the name of a river, population of a city, depth of a lake). It is widely used in resource exploration, environmental monitoring, meteorology, and military surveillance.