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Dear all; I want to extract special wavelength of landsat8 image, 470nm, and 570nm. Is there any way to do this?Sincerely [[alternative HTML version deleted]]

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Dear all; I want to extrac special wavelength of landsat8 image, 470nm and 570nm. Is there any way to do this? Sincerely -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com [[alternative HTML version deleted]]

Dear all;I am the new userr of R. I have a question about prediction or simulation the Eutrophication in lake. Is there any way to predict or simulate the Eutroph. by Neural network?If so what are the inputs...

I have a shapefile point and I plot it over my polygon. Is it possible to label station names over points?Sincerely. S_Point = readOGR(".","point")plot(S_Point,add=TRUE,col="black",pch=20,cex=2) [[alternative HTML version...

Dear R users I am trying to find a formula to calculate the angle of a polyline. Is there a way to do this? Many thanks. -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com...

I have a shape file as poly line and I want to convert it to polygon.Is it possible to do that in R?lake <-readShapeLines("./lake_main_utm.shp")proj4string(lake) <- CRS("+proj=utm +zone=39 +datum=WGS84") Sincerely...

Dear R users; I want to convert a rectangle into 2 new rectangles. I have a rectangle (18 m * 200 m), and I want to subtract 45 percent of it's area as a new rectangle. Is it possible to...

I have a shape file as poly line and I want to convert it to polygon.Is it possible to do that in R? lake <-readShapeLines("./lake_main_utm.shp")proj4string(lake) <- CRS("+proj=utm +zone=39 +datum=WGS84") Sincerely...

Dear R users; I am searching for a package to extract bathymetry data from topography map to produce the control file for CE-Qual-w2 model. Is there anyone to know how to do it? many thanks. -- Best Regards Javad...

Hi all; I am working with a data set, pH of a lake water, and there is some gap in my data. I it possible to predict these gaps by neural network? If so please help to use the right...

Dear R users; I am using CCA package to calculate the correlation between two data set. Every time that I run my codes, I get the following error; "the leading minor of order 5 is not positive definite". Please help...