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High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

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2) 2D feature<br />

extraction<br />

Extraction <strong>of</strong> 2D<br />

features is<br />

difficult.<br />

(a) Built-up Individual<br />

buildings not<br />

visible. Built-up<br />

area is captured<br />

as a single<br />

polygon.<br />

(b)<br />

Transportation<br />

(c ) Water<br />

bodies<br />

(d) Other land<br />

use<br />

(e)<br />

Topographical<br />

features<br />

(f) Utility<br />

features<br />

Only main roads<br />

and village roads<br />

are clear and<br />

they are<br />

captured. Cart<br />

tracks and foot<br />

paths are not<br />

clear and visible.<br />

So very less cart<br />

tracks and foot<br />

paths are<br />

captured.<br />

Major streams<br />

captured as<br />

single line.<br />

Captured as<br />

agricultural land,<br />

wasteland,<br />

plantation land<br />

and forest.<br />

Extraction <strong>of</strong> 2D<br />

features is<br />

relatively<br />

comfortable.<br />

Most <strong>of</strong> the<br />

buildings are<br />

clearly visible.<br />

Built-up area is<br />

captured as<br />

single buildings<br />

and group <strong>of</strong><br />

buildings.<br />

All types <strong>of</strong><br />

roads are<br />

clearly visible<br />

and they are<br />

captured.<br />

Major streams<br />

captured on<br />

both edges and<br />

minor streams<br />

captured as<br />

single line.<br />

Captured as<br />

agricultural<br />

land, wasteland<br />

plantation land<br />

and forest<br />

Extraction <strong>of</strong> 2D<br />

features is relatively<br />

comfortable.<br />

.Most <strong>of</strong> the buildings<br />

are clearly visible.<br />

Built-up area is<br />

captured as single<br />

buildings and group <strong>of</strong><br />

buildings<br />

All types <strong>of</strong> roads<br />

except foot paths are<br />

clearly visible and they<br />

are captured. Foot<br />

paths are not clearly<br />

visible.<br />

Major streams<br />

captured on both<br />

edges and minor<br />

streams captured as<br />

single line.<br />

Captured as<br />

agricultural land,<br />

wasteland, plantation<br />

land and forest.<br />

Spot heights Spot heights Spot heights<br />

Tree symbol. Tree and poles<br />

symbol etc.<br />

Tree and poles symbol<br />

etc.<br />

116

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