Eero Ahokas

TL;DR: The review shows that most previous studies have concentrated on the mapping and analysis of network components, and more attention should be given to an integrated use of various data sources to benefit from the various techniques in an optimal way.

TL;DR: This study presents methods for automatic detection of buildings and changes in buildings from airborne laser scanner and digital aerial image data and shows the potential usefulness of the methods with thorough experiments in a 5 km2 suburban study area.

TL;DR: The first results from LIDAR-based brightness measurement of grass and sand show that the gravel-based calibration approach works in practice, is cost effective, and produces statistically meaningful results.

TL;DR: Systematic laboratory measurements of laser backscatter intensity are presented for brightness calibration targets, and a calibration scheme for airborne laser scanner intensity data is proposed, which provides new information on the surface albedo dependence of backscattering effects.

TL;DR: In this article, the calibration of Optech ALTM 3100 laser scanner intensity is reported using airborne experiments and known brightness targets, which are used for radiometric calibration, permanent ground control points for small, medium and large scale geometric calibration and also test bar targets for spatial analysis of analogue and digital aerial cameras.