@inproceedings{Buchin:2004:ITD,
opteditor = {},
optpostscript = {},
www = {http://page.mi.fu-berlin.de/~buchin/proj/line_drawings_terrain/},
optaddress = {},
optorganization = {},
author = {Kevin Buchin and Sousa, Mario Costa and J{\"u}rgen D{\"o}llner and
Faramarz F. Samavati and Maike Walther},
optkey = {},
optannote = {},
optseries = {},
url = {http://pages.cpsc.ucalgary.ca/~mario/projects/2004/MCW/},
optpublisher = {},
localfile = {papers/Buchin.2004.ITD.pdf},
optisbn = {},
optmonth = {},
optciteseer = {},
optdoi = {},
optpages = {},
optcrossref = {},
booktitle = {4\textsuperscript{th} ICA Mountain Cartography Workshop in Vall
de N{\'u}ria, Catalunya, Spain, 30. September--2. October 2004)},
optvolume = {},
optnumber = {},
abstract = {Landscape illustrations and cartographic maps depict terrain
surface in a qualitatively effective way. In this paper, we
present a framework for line drawing techniques for automatically
reproducing traditional illustrations of terrain by means of slope
lines and tonal variations. Given a digital elevation model,
surface measures are computed and slope lines of the terrain are
hierarchically traced and stored. At run-time slope lines are
rendered by stylized procedural and texture-based strokes. The
stroke density of the final image is determined according to the
light intensities. Using a texture based approach, the line
drawing pipeline is encapsulated from the rendering of the terrain
geometry. Our system operates on terrain data at interactive rates
while maintaining frame-to-frame coherence.},
title = {{I}llustrating {T}errains using {D}irection of {S}lope and
{L}ighting},
year = {2004},
}
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