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Extracting highest point within a polygon using Terrain 5 dataset

THomasDanks

Hello,

This maybe be a stupid question/simple answer scenario. I have a Terrain 5 dataset (OS Terrain 5 – height DTM and contour data ), existentially an ASCII grid. Its loaded in my ArcMap as point, line and area layer. I am looking to extract the highest point within a polygon. For example I create a polygon shapefile around a section of town and then want to find the highest point (location X,Y) within this polygon I've drawn. Is this possible to do this just using this shapefile and Terrain 5 dataset? Can I use a standard toolbox tool for this, or does it require a few more steps?

Any help would be greatly appreciated.

Regards,

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THomasDanks

Thanks again. It looks like the Terrain 5 layer I'm trying to use is not compatible with this tool as I am not getting that pulldown arrow next to "Input value raster". (I should of said I'm on Arcmap 10.2.1). I've had a look Terrain 5 layer source and the layer is in SDE Terrain format. I haven't got much experience with this format, will it be possible to use this dataset to achieve the above? Will I need to use another tool / combination of tools to accomplish it?

Thanks again

XanderBakker

Zonal Statistics as Table allows selection of a raster that you have in your TOC:

If it doesn't show up in the list or the option is not provided, it is not a valid format.

Can you double click on the layer and check the datasource:

THomasDanks

Thanks for your reply, I'll try this out and get back to you. Think I will have to mosaic a lot of rasters, as its an entire Country (Scotland). We have a corporate .mxd we use and this links to the Terrain 5 dataset for whole of Scotland which is stitched together. I can't get access to this file directly however. Is there anyway I can reference the Terrain 5 layer in my Arcmap view within the .mxd and run this tool? The "input raster value" box seems to want to select a file from your hard drive. Apologies if I'm missing the obvious here.

XanderBakker

You can use the Zonal Statistics as Table tool (Zonal Statistics as Table—Help | ArcGIS Desktop), use the polygon as zone and the raster as raster value data to get statistics from a raster at that polygon (like the maximum value). In case you have multiple rasters, you might want to mosaic them together (Mosaic To New Raster—Help | ArcGIS Desktop )

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