This study analyzed more than 50 years of land cover and land use changes in the 260 km 2 Koga catchment in North Western Ethiopia. The data used includes 1:50,000 scale aerial photographs, Landsat MSS, TM and ETM images, and ASTER images together with ground truth data collected through field surveys and community elders’ interviews. Aerial photographs have high spatial resolution but provide ...

-Large-scale assessments are useful tools for identifying population status of trout and other species throughout their ranges. We reviewed published and unpublished assessments for 15 native inland trout species in the United States to (1) evaluate common elements; (2) estimate lost habitat for native trout and (3) identify effective approaches or actions taken after completion of assessments ...

This paper uses the introduction of barbed wire fences to the American Midwest in the late 19th century to estimate the effects of property rights on farmers’ production decisions. Farmers were both formally and informally required to build fences to secure exclusive land-use rights, yet preferred wooden fences had been prohibitively expensive in areas with little woodland. The introduction and...

Although still predominantly rural, Rwanda is one of the world’s fastest-urbanising countries. This paper considers the Rwandan Patriotic Front’s approach to urban development in the context of intense pressure on land and a stated long-term agenda of moving towards a future that is ‘100% urban’. The RPF government has won plaudits for its transformation of Kigali, and its Land Tenure Regularis...

To study the effects of growth management efforts on urban fringe areas in Washington State’s Puget Sound region, USA, this study documents and quantifies transformations in land cover and land-use from 1974 to 1998 for a 474 km2 study area east of Seattle. Geo-referenced aerial photographs (orthophotos) were digitized, then classified, to compare patch patterns (clustered versus dispersed vege...

in recent decades, the city development and city settlement have been tremendous. this has caused unequal physical and spatial expansion. the 21st century is the century of the city and living in city and almost half of the world population live as citizen. a glance at forecasting the data and statistics in 1400 shows an estimation of 130 millions of population and the calculation of present ci...