James Rowland (Former Employee)
Science and Products
Filter Total Items: 47
Estimating Meher crop production using rainfall in the 'Long Cycle' region of Ethiopia Estimating Meher crop production using rainfall in the 'Long Cycle' region of Ethiopia
Meher season crop production is well correlated with April-May rainfall in the Ethiopian 'long cycle' crop growing region. This relationship is used to estimate 2003 Meher small farmer gross production at 87 =B1 10 million quintals (8.7 million MT2 =B1 1 million MT) of cereals, pulses and other crops, using data from the Central Statistical Authority (CSA). Assuming recent levels of...
Authors
Chris Funk, Alemu Asfaw, Phil Steffen, Gabriel Senay, James Rowland, James Verdin
Interactive visualization of vegetation dynamics Interactive visualization of vegetation dynamics
Satellite imagery provides a mechanism for observing seasonal dynamics of the landscape that have implications for near real-time monitoring of agriculture, forest, and range resources. This study illustrates a technique for visualizing timely information on key events during the growing season (e.g., onset, peak, duration, and end of growing season), as well as the status of the current...
Authors
B. C. Reed, D. Swets, L. Bard, J. Brown, James Rowland
A weighted least-squares approach to temporal NDVI smoothing A weighted least-squares approach to temporal NDVI smoothing
Satellite imagery provides a unique vantage point for observing seasonal dynamics of the landscape that have implications for global change issues. An objective evaluation of surface conditions may be performed using the normalized difference vegetation index (NDVI) derived from National Oceanic and Atmospheric Administration advanced very high resolution radiometer data. NDVI data are...
Authors
D. Swets, Bradley C. Reed, James Rowland, S.E. Marko
Estimating maize production in Kenya using NDVI: Some statistical considerations Estimating maize production in Kenya using NDVI: Some statistical considerations
A regression model approach using a normalized difference vegetation index (NDVI) has the potential for estimating crop production in East Africa. However, before production estimation can become a reality, the underlying model assumptions and statistical nature of the sample data (NDVI and crop production) must be examined rigorously. Annual maize production statistics from 1982-90 for...
Authors
J.E. Lewis, James Rowland, A. Nadeau
Vegetative index for characterizing drought patterns Vegetative index for characterizing drought patterns
No abstract available.
Authors
James D. Rowland, A. Nadeau, J. C. Brock, R. W. Klaver, D. G. Moore, J. Lewis
Science and Products
Filter Total Items: 47
Estimating Meher crop production using rainfall in the 'Long Cycle' region of Ethiopia Estimating Meher crop production using rainfall in the 'Long Cycle' region of Ethiopia
Meher season crop production is well correlated with April-May rainfall in the Ethiopian 'long cycle' crop growing region. This relationship is used to estimate 2003 Meher small farmer gross production at 87 =B1 10 million quintals (8.7 million MT2 =B1 1 million MT) of cereals, pulses and other crops, using data from the Central Statistical Authority (CSA). Assuming recent levels of...
Authors
Chris Funk, Alemu Asfaw, Phil Steffen, Gabriel Senay, James Rowland, James Verdin
Interactive visualization of vegetation dynamics Interactive visualization of vegetation dynamics
Satellite imagery provides a mechanism for observing seasonal dynamics of the landscape that have implications for near real-time monitoring of agriculture, forest, and range resources. This study illustrates a technique for visualizing timely information on key events during the growing season (e.g., onset, peak, duration, and end of growing season), as well as the status of the current...
Authors
B. C. Reed, D. Swets, L. Bard, J. Brown, James Rowland
A weighted least-squares approach to temporal NDVI smoothing A weighted least-squares approach to temporal NDVI smoothing
Satellite imagery provides a unique vantage point for observing seasonal dynamics of the landscape that have implications for global change issues. An objective evaluation of surface conditions may be performed using the normalized difference vegetation index (NDVI) derived from National Oceanic and Atmospheric Administration advanced very high resolution radiometer data. NDVI data are...
Authors
D. Swets, Bradley C. Reed, James Rowland, S.E. Marko
Estimating maize production in Kenya using NDVI: Some statistical considerations Estimating maize production in Kenya using NDVI: Some statistical considerations
A regression model approach using a normalized difference vegetation index (NDVI) has the potential for estimating crop production in East Africa. However, before production estimation can become a reality, the underlying model assumptions and statistical nature of the sample data (NDVI and crop production) must be examined rigorously. Annual maize production statistics from 1982-90 for...
Authors
J.E. Lewis, James Rowland, A. Nadeau
Vegetative index for characterizing drought patterns Vegetative index for characterizing drought patterns
No abstract available.
Authors
James D. Rowland, A. Nadeau, J. C. Brock, R. W. Klaver, D. G. Moore, J. Lewis