Sample digital terrain models

Availability

Aerolaser scanning

eTOD

Specifitations, Regulatory Documents and Nomenclature

A digital terrain model is a collection of points where, in addition to the plane co-ordinates (X, Y), the elevation above sea level (Z) is also known
The model is derived using specialised stereo tools, using aerial photographic images
A portion of the data is obtained through laser scanning. The points cover an area in the form of a regular or irregular network

LGIA 28th December, 2009, regulations No. 8 "Basic requirements for digital terrain model (DTM)" (only in Latvian):
Basic requirements for digital terrain model (DTM) (0.07 Mb)
Annex 1 (0.03 Mb)
Annex 2 (0.03 Mb)
Annex 3 (0.03 Mb)
Annex 4 (0.24 Mb)
Annex 5 (0.29 Mb)
Annex 6 (0.03 Mb)
Annex 7 (0.04 Mb)