Latest Contributions by MichaelBrown3

Hello, I am working with 100 Netcdf files each with 365 (one for each day of the year) layers of time pertaining to the freeze thaw status of a region. My problem is that half of them are inverted, they must be flipped on the x axis. Everything else is perfect except for this. Now I know how to, and have, extracted a single time layer and can flip that to be a useful raster layer but I simply cannot feasibly do this for 50 netcdf files (50 netcdf's x 365 = too too much to flip manually). Is there an ability in Arc that I am unaware of that can flip the entire netcdf as it is? ... View more

So I have been tasked with parsing through a large amount of data. The data is in HDF5 file format and has about 30 raster layers within each HDF5. I need to be able to open up a specific layer from within these HDF files. For eaxmaple, I have been working with opening up the 20th layer. If i normally add the HDF (like any other data through the add data button), I get prompted to select a layer (which is when I select layer 20), but then I get prompted that there is "inconsistent spatial extent error". I tried a work around by using the "Extract Sub-set" tool in data management but realized that the spatial extent error will apply to all of the layers within this HDF. Geographic coordinate systems and projected coordinate systems always, ALWAYS, throw me for a loop. I have attached an image of what is displayed if I ignore the error warning as well as the extent of the problematic data frame (large extent values) and a functioning data frame (normal extent values). The research area is of Alaskan and the topic is wildfires. I understand it may be elementary, but can I please have an explicit walk through of how to remedy this error? ... View more

Hey all, I am having an issue converting netCDF files into raster format. The data is satellite composite imagery that show vegetation over in the amazon. I have many of these net CDF files and they range in size from about 60kb - 80kb each. I have been using Multidimensional tools --> Make NetCDF Raster Layer. I have been following the guide seen here. How to Import Gridded Data in NetCDF Format into ArcGIS | GES DISC  However, I am not getting a raster layer at the end. A layer does appear but it has a little red exclaimation mark next to it. How can I identify what this means? Michael - ... View more

Hey All; I am attempting to do various geo-spatial point data analysis and have gotten stuck. I have centroid point data of polygons, but the centroid point has no value to auto-correlate in a semi-variogram (Except for long/lat). Long/Lat doesnt help me much because a point density map doesn't tell me much in my situation. I really want to average the "grid_code" value for all of the points in the data ad attach that value to the centroid point data. I have attached multiple screen shots showing what I have. My questions are this: 1). Is there a way to average clustered point data and join the value to an existing centroid point data shapefile? 2). What other useful spatial analysis can be done on point data such as this? Thank you for your time - Michael - Screenshot description: Poly Data = Polygon shapefile data Centroid Points = poly data convert into centroid points All Point = polygon data converted into point data. (Polygons were converted to raster and then used as a mask to extract data from another map to retrieve values). All Point2 = zoom of all point screen shot All Point3 = Zoom of all point2 screen shot ... View more

Hello, I am delineating streams using the hydrology tools in the arc toolbox and I have an issue. It is not that I dont know how to do it or what tool to use, but it is a threshold decision. The "conditional statement" defines the minimum number of pixels that are required to "flow" into another pixel in order for that pixel to be delineated as a stream. I have a 2m, high resolution DEM spanning 164 km2. My question is, if I can put in what ever value I want, how can I remove the subjectivity from that decision? I am currently using a conditional statement of 13,000 pixels (an area of about .1 km). How can I validate this or is there even a way to validate this? Thank you for your time, Michael ... View more

Hello, I am delineating streams using the hydrology tools in the arc toolbox and I have an issue. It is not that I dont know how to do it or what tool to use, but it is a threshold decision. The "conditional statement" defines the minimum number of pixels that are required to "flow" into another pixel in order for that pixel to be delineated as a stream. I have a 2m, high resolution DEM spanning 164 km2. My question is, if I can put in what ever value I want, how can I remove the subjectivity from that decision? I am currently using a conditional statement of 13,000 pixels (an area of about .1 km). How can I validate this or is there even a way to validate this? Thank you for your time, Michael ... View more

Hello, I am asking for someone to walk me through my first time using "snap raster". I have 7 rasters that have been clipped to my region of interest. (Which I thought was fine). I then found that the cell sizes where all slightly different which in turn creates a different number of rows and columns. I am looking for my 7 rasters to all have the same cell size, with the same number of rows and columns. Will snap raster help align the rows and columns once the cell sizes are the same? And if so, will the cells be aligned PERFECTLY?   - Michael - ... View more

I have been attempting to export a satellite image from arcmap and I cannot do it in the way I would like. I am trying to export a geotiff file so that it can be read in matlab. Every time I export, it is an image, not data. How to I export an image with correct lat long values so that it can be read in matlab? ... View more

So I have been working with World View - 2 data and it is high resolution (about 2m). I am now wanting to incorporate Landsat data but the resolution is much coarser (30m). Is the resample tool (data management) the only way to compare data sets? I am looking for small features that may not even be resolved by the landsat imager but I want to specifically be able to say that they cannot, not only that I assume that landsat cannot resolve these features. So question:.... How can I get these rasters on the same cell size so that I can compare the two? How many ways are there to do this besides resample tool? - Thank you for your time - Michael ... View more