A prototype graphic landscape analysis system: Part 1. Predicting spatial patterns of grazing pressure using GIS

Authors: Namken, Jerry C.; Stuth, Jerry W.

Source: International Journal of Geographical Information Science, Volume 11, Number 8, 1 December 1997 , pp. 785-798(14)

Publisher: Taylor and Francis Ltd

Buy & download fulltext article:


Price: $61.16 plus tax (Refund Policy)


Abstract. A prototype spatial graphic landscape system for use in PC-based micro-computers was developed. Spatial characteristics and attributes of a landscape were entered into a geographical information system to create a data base. A grazing pressure index was modelled using an algorithm which sequentially adjusts grazing capacity of response units for percentage lost to brush density, slope, and distance from water. The grazing pressure model was verified on a poorly watered homogeneous pasture (1302ha) and well watered complex pasture (2959ha). Response units were highly correlated to observed grazing ( r 0.92-0.94) in the poorly watered, homogeneous pasture. However, correlations were poor in the complex, well-watered pasture. Circular barrier effects of slopes, intermittent watering sources and relative differences in ecological condition of adjacent response units were identified as the primary factors reducing model performance.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/136588197242086

Publication date: December 1, 1997

More about this publication?
Related content


Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page