Manzul Kumar Hazarika
Due to high cost, limited coverage and huge computational resource requirement, SPIN-2 data may not be suitable for
using in Asian Highway of 90,000km in length, even though it identifies a road distinctly and estimates its width with a
maximum error of 2m in all four types of roads considered in this study. ADEOS Panchromatic data and SPOT
Panchromatic data can identify the roads having width of 64m, 35m and 15m distinctly. Among these three kinds of
roads, maximum error in width measurement is found in the case of 64m wide road, using ADEOS Panchromatic and
SPOT Panchromatic data and it is 6m and 8m in analog and digital methods respectively. Data of such a resolution is
comparatively cheap and covers a large area repetitively, therefore, it will be very useful for Asian Highway. ADEOS
Multispectral data and LANDSAT TM data has capability to identify a road up to a minimum width of 35m, but can not
estimate the width of a road closely to its actual width. Extracted road information from satellite data will be also useful
for cross checking the accuracy of the highway database available with some of Asian Highway member countries of
the UN-ESCAP.
REFERNENCES
United Nations, 1998. Asian Highway, Joint ESCAP-Japan Symposium on Highway Development, ST/ESCAP/1829,
Sales No. E.98.ILF.72, New York.
372 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000.