Latest Contributions by VarshaGopalakrishnan

Hi, I have a .nc4 file of leaf area index values for all the states (lower 48) in the US but I want to extract the data for each state individually. Each pixel in the .nc4 file has a time series dataset in it. I first converted the netcdf file to a raster layer in ArcGIS and then used a state wise shapefile to clip the raster layer to the shape boundary. But the .lyr file created, does not have the time series data in it. Is there a way to extract these polygons from the raster layers and convert the state-wise polygons back to a netcdf format? The reason why I need to convert it back to netcdf is because I am using Matlab (ncread command) to read the dataset, interpolate values and even for plotting. Thanks for the help! ... View more

Hi, I'm trying to calculate the leaf area index of different vegetation species at each state in the US and I'm using a netcdf (.nc4) raster file for the LAI and a usual shapefile (with polygons) for defining the state boundary. I converted the net cdf file into a raster file using the "Make NetCDF raster layer tool". I'm using the Clip tool (< Raster Processing < Raster < Data management tools < Arc toolbox) in the arctool box to clip the raster layer and the polygons. So in this case, my output extent are the states that I choose from the shapefile and the Input raster is the raster layer ofcourse. I also checked the "Use Input Features for Clipping Geometry" option so that the raster dataset is clipped onto the perimeter of the shapefile. Here is my question: Sometime, there are additional pixels that are created in the output raster dataset, that are actually not present in the original input raster layer. And these pixels also have a value associated with it, which is a cause of concern since some states which should actually have a zero value in it, have a random number in the output file. Could someone explain what's happening or the possible reasons for this? Thanks! ... View more