A methodology was developed to permit rectification and metrification of digital images of steel truss gusset plate connections. The approach will enable rapid and accurate collection of field measurements as compared to traditional methods to enable structural evaluation of gusset plate connections. The program enables the operator to quickly create...
This document partially addresses the Wetlands component of San Juan County’s Critical Areas Ordinance (CAO). Drawing from a foundation in best available science, it describes important functions performed by the County's wetlands, effects of various activities on those functions, and strategies for protecting wetland functions from impacting activities, with an...
This publication consists of a rule set for benthic habitat classification implemented in eCognition (Trimble Navigation Limited). The details of the procedure are described in Parrish et al., 2016: http://www.jcronline.org/doi/abs/10.2112/SI76-017. The input to the classification consists of high-resolution true color orthophotos, seafloor DEMs from topobathymetric lidar, and gridded lidar reflectance...
A practical demonstration of a method for
rating forest stands as to their probability of
defoliation by the Douglas-fir tussock moth
using aerial photographs and available cruise
data was done in the Palouse Ranger District,
Clearwater National Forest, Idaho.
A nonlinear computer program, RISK, was used to
identify significant independent...
The purpose of this study was to better understand the level of
wetland classification consistency among three different land cover layers
created using Geographical Information System (GIS) and remote sensor
technology. Where inconsistencies in data existed, the goal was to identify the
kinds of inconsistencies that occur. The results were...
Green Point Consulting created a GIS layer of current and likely former tidal wetlands in the Yaquina and Alsea estuaries, working from the National Wetland Inventory (NWI) mapping and applied their field knowledge of the estuaries, as well as newly available data such as LiDAR and recent aerial orthophotos. They...
The Columbia River system in the Pacific Northwest is currently comprised of a series of
reservoirs, resulting from regulation of river flow due to a series of hydroelectric dams.
A return to pre-dam conditions might improve salmon (Oncorhynchus sp.) survival rates
and increase migration efficiency. This study modeled both historic...
Natural resources are essential to humanity. With the increase in global development in recent decades, people must monitor the state of the environment, whose disturbance has a more significant impact on society than before. However, conventional environmental monitoring is challenged in highly dynamic ecosystems and large areas. As a solution,...
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Figure 4-2. Raw images and unprocessed orthophoto created from the images acquired with the
We used radiotelemetry to study space use and habitat selection of 16 Northern Spotted Owls (Strix occidentalis caurina) on the eastern slope of the Cascade Mountains, Washington, U.S.A., in 1989–1990. We used a geographical information system (GIS) and aerial photo interpretation of digital orthophotos to assign owl locations a value...
Sauvie Island lies at the confluence of the Columbia River and the Willamette River near Portland, Oregon. Flooding, erosion, and deposition of sediments have been part of the natural evolution of the island. However, with the construction of multiple dams in the Columbia River Basin, levees, and hardening of upstream...
