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Best DTM resolution in order to create contours

argyroargyrou1

I have a DTM with cel size 10 x 10. I am trying to create contours for scale 1:25000 using the tool on Defense Mapping

Create contours.

I have insert parameters as seen below...

The results that i get includes only contours from 20m - 900m height.

But in DTM i have elevation up to 1940m. Why this information has been lost. Where is the problem? Should I resample my raster again and if yes what is the best cell cize for resampling for the above scale?

Above is the result with the gap of contours areas

Thanks

Argyro

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DanPatterson_Retired

try a different scale, your contours are really crowded now

DanHopkins

Hi Argyro,

Can you please try the following:

1. For the Raster Elevation Units parameter, specify Meters.

2. For the Contour Elevation Units parameter, specify Meters.

3. For the Resample Raster parameter, make sure it is checked.

What happens?

Regards,

Dan

argyroargyrou1

Hi Dan, I have followed your advice but still have the same results... Any other idea?

Regards

Argyro

argyroargyrou1

I tryed a different scale but still no big changes...

DanHopkins

Hi Argyro,

Thank you for responding.

Can you please answer the following:

1. What happens if you specify a single area of interest?

2. Would you be able to provide the input raster?

3. What version of ArcGIS Desktop are you running?

3. What version of Esri Defense Mapping are you running?

4. What is the OS of your machine?

Regards,

Dan

argyroargyrou1

Hi Dan,

I apologize for the delay in your questions...

1) If I specify a single area the tool runs successfully besides the area I attached above...

2) I could provide the specific area of the input raster but....(see below answer no 4)

3) We are running 10.5.1 ArcGIS Desktop and 10.5 Esri Defense Mapping

4) The OS of my machine is Windows 7, except one of my colleagues machine which runs Windows 10.

So after your questions we run the tool again in OS Windows 10 ...and the tool run successfully without having any gap area...

I did also specify the parameters you suggested.

So everything seems to work better in OS Windows 10.

Should we have to update our OS to Windows 10? Is it a precondition in order Defense Mapping tools run successfully?

Many many thanks for your help.

Regards

Argyro

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