topic Re: Convert DEM to contour lines and TIN in Spatial Data Science Questions

Convert DEM to contour lines and TIN

AYGÜNALBAYRAK — Fri, 26 Aug 2016 12:20:52 GMT

I have 17800 raster images which have detailed version of raster formats. The scale is 1/1000 for each of them. I want to create contour lines and TIN surface for "one" raster data which was made from merging from all 1/1000 raster datas. To create one raster firstly I opened a .gdb and then I created a "raster dataset". I had a tiff format raster shown like the picture in the attach file. I wanna convert the raster surface to the contour lines and TIN surface. However, the ArcMap conclude the process with error. I cant reach a solution. What should I do?

Re: Convert DEM to contour lines and TIN

DanPatterson_Retired — Fri, 26 Aug 2016 12:27:31 GMT

first symbolize it as unstretched. Are the z values elevation?

What was the exact error message?

Are the data in projected coordinates?

what is the extent of the raster?

cell size?

pretty well anything you might add to help provide a solution would be useful

Re: Convert DEM to contour lines and TIN

AYGÜNALBAYRAK — Fri, 26 Aug 2016 12:51:49 GMT

The error code is 001143. I received the errror 1 hour later after the process has been initiated. the properties are on the imag with unstreched raster. The raster has z values, too.

Re: Convert DEM to contour lines and TIN

DanPatterson_Retired — Fri, 26 Aug 2016 14:47:13 GMT

Did you have a look at the number of rows and columns you were trying to process? and the cell size?

You aren't going to get it to process, you are running out of memory probably.

Try it without background processing.

Save the file to a local disk and don't try to run from some network location.

Simplify your raster. You certainly don't need 25 cm resolution, especially if you are contouring. So Resample it.

Try again, if that doesn't work, Resample or Tile the inputs. Get it to work at some scale, then play around with methods of getting a finer resolution if that is critical.

Re: Convert DEM to contour lines and TIN

SteveLynch — Fri, 26 Aug 2016 15:55:08 GMT

split it up (with a 1 cell overlap) using SplitRaster

Re: Convert DEM to contour lines and TIN

AYGÜNALBAYRAK — Mon, 29 Aug 2016 08:03:13 GMT

I'm trying to convert resolution from 25 cm to 1 m by Resampling tool on a local disk and without background processing. However, I receive error message. My final properties are like the image.

Re: Convert DEM to contour lines and TIN

AYGÜNALBAYRAK — Mon, 29 Aug 2016 08:09:42 GMT

Split raster up with a 1 cell overlap doesn2t work,too. Should I try to create a raster dataset again?

Re: Convert DEM to contour lines and TIN

DanPatterson_Retired — Mon, 29 Aug 2016 08:10:46 GMT

error message please...

down from 600,000-rows to 168,000-ish.... pretty soon, it will be down to a manageable size to do contouring. perhaps a 5 meter cell size... or do the tile thing as suggested several times should you need to produce at a certain resolution. Remember, there is a 'need' and a 'nice', why do you require such a fine cell size? is it for further analysis? or just for the visual affect?

Re: Convert DEM to contour lines and TIN

AYGÜNALBAYRAK — Mon, 29 Aug 2016 08:27:06 GMT

The steps and error message is like the image. I wanna make further analysis and I need 1m x 1m cell size maximum. I show my 3d buildings and infrustructure as nature gas, electric cable network, water canals etc. I will shor these structural elements with different lod levels so I need 25cm x 25 cm to zoom in. In addition to these, I need contour levels because of creating edge vertices' z values of buildings (base contour values).

Re: Convert DEM to contour lines and TIN

DanPatterson_Retired — Mon, 29 Aug 2016 09:09:37 GMT

actual error message is cut off, but in any event, your solution is to tile into smaller chunks