Guillermo Federico Olmedo
2016-Aug-01 22:35 UTC
[R-pkgs] new version of package water: Actual Evapotranspiration with Energy Balance Models
Dear R users, I'm glad to announce the new version of water package (0.5). As this is my first message to the list, I want to add that this package provides tools to estimate actual evapotranspiration from surface energy balance models. Right now you can run the well-know METRIC model using it. This model allows to estimate the energy balance using landsat (7 or 5) images and a weather station. I'll be happy to discuss or provide more information. Regards, Guillermo. ######################### The changes since the last version are: * Added maxit parameter to calcH to control the maximun number of iterations. * Added an optional constrain to the selection of anchors pixels using the location of the weather station and a 30km buffer. * Changed default value for Z.om.ws in calcH. (From 0.0018 to 0.03) * Added a new parameter to calcAnchors, available for both methods: buffer. buffer allow to set the minimun distance between two anchor pixels of the same kind * Added a new method for calcAnchors = "CITRA-MCBbc". This method chooses the coldest and hottest anchors pixels availables. Previous method ("CITRA-MCBr") chooses random pixel who meets the conditions. CITRA-MCBbc is now the default method for calcAnchors * General remote sensing functions moved to a separate file * loadImage detects when there is more than 1 image on the working folder * Rn, G, H, LE are restricted to values > 0 * Improvements to anchors pixels selection: more releaxed hot temperature criterium, distance, mean of many pixels, etc * Added two methods for land surface estimation: single channel and split windows. Split windows only works for Landsat 8. * loadImage now loads thermal data also: low gain for L7 and both bands for L8 * Fixed big bug when estimating ETo with a large weather station file