topic Re: Generating contours from World Elevation Layer (Terrain) by Esri in Geoprocessing Questions

Generating contours from World Elevation Layer (Terrain) by Esri

HARUNAPAM — Sun, 16 Oct 2022 21:13:36 GMT

Hello. I use ArcGIS Pro, version 3.02.

All my attempts to generate feature contours from a clip of the World Elevation Layer using both the 3D Analyst and Spatial Analyst tools have been unsuccessful. On each attempt, the tool will run to completion (100%) but instead of generating the feature will restart from scratch (0%).

Grateful if someone can please help me out.

HARUNA

Re: Generating contours from World Elevation Layer (Terrain) by Esri

DanPatterson — Sun, 16 Oct 2022 22:48:06 GMT

Contour (Spatial Analyst)—ArcGIS Pro | Documentation

What is the raster size?

Are your machine specs up to the task given the raster size and info in the link?

What parameters did you set for the tool

Re: Generating contours from World Elevation Layer (Terrain) by Esri

SteveLynch — Mon, 17 Oct 2022 10:19:30 GMT

...and, if the raster is huge you should use the Contour raster function

Re: Generating contours from World Elevation Layer (Terrain) by Esri

HARUNAPAM — Mon, 17 Oct 2022 15:43:58 GMT

Thanks a lot for your response. The answers to your questions are:

Raster size – 38.12 GB (uncompressed size)

Machine specs:

Intel core i5

8 GB RAM

64-bit OS

Parameters:

Contour interval – 5M

Base contour – 0

Z factor – 1

Contour type – contour

Environments:

Cell size – same as input raster

Cell size projection method – convert units

Default inputs were maintained for all other parameters

Re: Generating contours from World Elevation Layer (Terrain) by Esri

HARUNAPAM — Mon, 17 Oct 2022 15:48:25 GMT

Thanks.

But I need a raster with statistics. Or can I generate a feature raster from the virtual raster that the Contour raster function generates?

Re: Generating contours from World Elevation Layer (Terrain) by Esri

SteveLynch — Mon, 17 Oct 2022 16:31:26 GMT

How many rows and columns does the raster have and what is the min/max of the values in the raster?

Re: Generating contours from World Elevation Layer (Terrain) by Esri

HARUNAPAM — Mon, 17 Oct 2022 21:45:49 GMT

Columns - 121757

Rows - 84034

It's a single band raster, and doesn't have statistics. However, the min/max values from the contents pane are 152.55/161.28

Re: Generating contours from World Elevation Layer (Terrain) by Esri

SteveLynch — Tue, 18 Oct 2022 10:38:24 GMT

That is a huge raster and it'll take a while to process. After how long did you kill it?

Maybe do it in parts and remember to overlap each part by 1 cell as the contours stop 1/2 from the edge.