Create Multidimensional Raster Data from Multiple NetCDF, GRIB, or HDF Files

[Music] hi everyone today we're going to talk about creating and managing multi-dimensional raster data in arcgis pro multi-dimensional data is data that's collected over multiple times depths or heights and multi-dimensional raster data is often used in oceanography climate analysis and agriculture arcgis pro provides a suite of tools and capabilities for visualizing analyzing and sharing multi-dimensional raster data just look up multi-dimensional analysis in our help documentation and you'll find prediction tools change detection tools and more but how do you start working with multi-dimensional raster data and how do you manage it well a lot of organizations already have access to netcdf grid or hdf files but how do we convert that to a format that can be used in arcgis pro or maybe you have a stack of images or rasters that have been collected over time but how do you get that into a format that can be used in our multi-dimensional analysis tools there are three main ways to create multi-dimensional raster data the first is from a single netcdf hdf or grid file the next is from a collection of those types of data files and the third is from a stack of images or rasters that have been collected over time this video will focus on generating a multi-dimensional raster from a collection of netcdf hdf or grid files so here i have a folder containing multiple netcdf files each one has daily maximum temperature data for a single year and i want to merge several of these into a single multi-dimensional raster so that i can have daily max temperature data for multiple years to do that we're going to add them to a mosaic data set so we'll create a new empty mosaic data set using the create mosaic dataset tool give it a name and keep all the other default parameters when it's created we can go ahead and add rasters to this mosaic dataset and we'll set the raster type to netcdf or hdf or grid depending on your data input and this is what tells the tool what kind of files to look for and also how to process these files in the output data set so we can browse to the location of our netcdf files i'll just select four and click open and i can do some post processing i can also select the raster type properties button to take a look at which variables will be included and this is especially helpful if my netcdf data has many variables but i only want one or two when it's finished you can take a look at the mosaic dataset properties and see that it already has this multi-dimensional information cooked in so we see the variable listed there and the standard time dimension also now you may have noticed that the mosaic data set displays as this big block of color instead of on a gradient and that's because we didn't choose to perform any of the raster processing or mosaic post-processing when we added data to our mosaic data set and depending on your goals that might be just fine if you only need a data set for cataloging or if you're going to use it as an analysis tool that will generate a new output maybe you don't need better visualization i went ahead and calculated statistics on my data set and then i zoomed in on florida to just get a nicer display now if we look at the attribute table for our footprint layer we can see that all the rasters were added to the data set and you can also see that this attribute table has a variable field here that tells us the name of our variable we have a standard time field and we have a dimension field which tells us the name of the dimension in our data set because all of these fields exist the mosaic data set is multi-dimensional aware which is why we can interact directly with the multi-dimensional tab at the top of our project we can also launch some of the analysis tools from this tab or from the toolbox and you can use the mosaic dataset as a direct input to some of these tools for example the aggregate multi-dimensional raster tool now all the analysis tools generate an output in cloud raster format which is esri's native multi-dimensional raster format if you want to take advantage of the capabilities of the cloud raster format file you might choose to convert your mosaic data set to cloud raster format using the copy raster tool here we will enter the mosaic dataset as the input specify the output as a cloud raster format file and check the box to process as multi-dimensional optionally you can also check the box to build a multi-dimensional transpose which is an efficient data storage option that is only available for cloud raster format when the tool finishes you will have a multi-dimensional raster in cloud raster format with all the variables and dimensions that you have in this mosaic data set in this video you saw how to add multiple multi-dimensional netcdf files into a multi-dimensional mosaic dataset in arcgis pro from there you can use the mosaic dataset directly in analysis tools or you can convert it to cloud raster format to get access to additional capabilities if you only have one net cdf hdf or grid file that you want to use with multi-dimensional raster tools or if you have a stack of images that you want to use in a single multi-dimensional raster check out the other creating multi-dimensional raster videos on this channel you

Channel: ArcGIS

Views: 3,154

Keywords: Esri, ArcGIS, GIS, Geographic Information System, ArcGIS Pro, imagery, multidimensional, raster, analysis

Id: 1ESpfo7du1I

Length: 6min 19sec (379 seconds)

Published: Wed Dec 09 2020