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I am trying to change the base hight of a jpg file to but it comes up with the message:'The layer and base surface do not overlap in extent. Verify they are for the same study area'. Both layers are in the same co-ord system. Can anyone help solve the problem? Thanks
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05-27-2014
07:23 AM
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Hey All, I have used the nearest neighbor tool to create a plane in ArcGIS 10. I now need to work out the volume above this plane and the DEM that I am using. I have previously used the surface volume tool under 3D Analyst but you can not add the plane in the 'plane height' section. Is there another way to calculate this? Thanks, Katie
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05-16-2014
05:38 AM
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Well it seems to have worked. For the nearest neighbor would you suggest making 2 feature classes? one for x, y and another for z co ordinates?
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05-15-2014
06:15 AM
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you might have to create an event layer or feature class from the table first. OK so in that case, i'm having trouble actually importing the data into a feature class. Before, I had tried to create a point file, and add my points in the attribute table, but I got stuck there. I'm very sorry, i'm new to ArcGIS and not very computer savy anyway, do you think you could talk me through how to add a spreadsheet into a feature class? Thanks for your time, I really appreciate it. Katie
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05-15-2014
05:42 AM
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Hey All, I am trying (!) to use the nearest neighbor tool on ArcGIS 10. I have x, y, and z co-ordinates in an excel spreadsheet, and have tried to import into the first line of the n.n tool 'input point feature' both in .txt and .csv format and it doesn't seem to want to work. Could anybody help me here?! Many thanks, Katie
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05-15-2014
05:05 AM
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This is starting to become more of a Matlab question, than ArcGIS, you might consider posting on a MathWorks forum (*). Although I have worked with a number of hydrologists using Matlab some 15 years ago, that is way to long ago to guide you. (*) just noticed you already did this 😉 Ha yep! Thought it might be a bit of a long shot on here...no matter, will try MathWorks again. Cheers
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04-23-2014
03:03 AM
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I think the easiest way to do this, is to simply export the "best fit surface" from Matlab as a physical entity, that is, as a raster or grid stored to disk in a format ArcGIS for Desktop can read, instead of trying to re-create the surface in ArcGIS based on the formulas alone. Although ArcGIS has some new features in the direction of using parameterized, formula based, raster processing for display purposes (see "What are the functions used by a raster or mosaic dataset?"), ArcGIS still heavily relies on physical datasets for processing and analysis. You might be able to use the display functionality to "fake" a Matlab "best fit surface", but I have to little experience using this new funtionality of ArcGIS to guide you or to tell you if it is actually possible (I guess it might involve first using a Constant function to create some level surface, than apply your Matlab fit). Maybe someone else with more experience using this could guide you. OK, I guess the problem I'm having is actually exporting the curve. Do you know how to do this if i'm using cftool?
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04-23-2014
02:28 AM
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Hey All, So, I have created a best fitting curve in Matlab (R2012a), and I have the code for it but I need to import it somehow into ArcGIS (using Arcmap10). My aim is to then use the surface volume tool to be able to calculate the volume of my DEM above the imported best fit plane from Matlab. I am pretty stuck, since I am also rather new to both Matlab and this type of process in ArcGIS. Any ideas would be most welcome. Thanks in advance, Katie p.s if you need any more info just buzz, not sure what I need to give in order for people to be able to help me.
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04-23-2014
12:59 AM
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Hi Sol, So back to GIS this morning (not sure where you are in the world-i'm in the UK) I looked at the message and I don't think it finished etracting it. Trying again right now. My DEM is huge - 7GB, so will take a while to do, but thanks for your help. Katie
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04-16-2014
01:05 AM
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OK, the extract by polygon doesn't let me put the shape file in, so I tried the extract by rectangle and it seemed to load but afterwards nothing happened. Katie
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04-15-2014
10:37 AM
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O wait, I found it but there is another problem message. Let me see if I can fix it and i'll get back you.
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04-15-2014
09:55 AM
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No, i'm on Arcgis 10. So I have analysis tools - extract - clip. The same message comes up as before. Thanks for your help by the way!
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04-15-2014
09:52 AM
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Hi All, So I have a large DEM that I need to crop, however, when using the clipping tool it states that 'one or more dropped items were invalid and will not be added to the control'. My DEM is a tif file. Anybody have any ideas on how to solve this. I am simply clipping to a shape file. Much appreciated, Katie
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04-15-2014
09:25 AM
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Ultimate aim is to be able to read the x, y, z co-ordinates and fit a plane to the base. Its for measuring the volume of lava around a volcano. Kinda have to be able to do it! There must be a way of compressing it haha. The only problem is, I can't actually get the DEM in to ArcGIS in the first place...the computer says no before its loaded. So I'm going to have to resolve this before I import it. Have tried cropping in photoshop, but it looks a bit weird. Trying to figure out now if it has messed up the pixel size...
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04-14-2014
07:51 AM
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