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Topics - madhavm

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General / GCP Error as function of distance from GCP
« on: January 12, 2018, 06:40:06 AM »

We have a few questions regarding GCP error:

- How does error increase as a function of distance from the GCP?
- How should GCPs be placed to meet a certain accuracy requirement? Should GCPs be placed closer together to increase the accuracy of a site?
- Does significant elevation differences on the site require an increase in the number of GCPs?
- How much elevation difference is allowed between GCPs? Is that even a criteria that needs to be considered?
- Is there a mathematical equation that can define error as a function of distance from the nearest GCP?

Madhav M.

General / Python API to control Bounding Box
« on: November 21, 2017, 08:36:35 PM »

Is there any specific python API to control the bounding box, or region?
In the Python API Manual, the only relevant function I can find is resetRegion(), which will reset the region (bounding box) to its default state. Is there any way to have finer control over the bounding box?

I want to be able to export and import the Bounding Box. Is this supported in any manner?

Also, I tried modifying the parameters of doc.chunk.region but that did not change anything. However, I see that in various Agisoft scripts (, doc.chunk.region is overridden completely by a new region.
Why is it that this is supported, while the parameter modification of a chunk's region is not allowed? Have I missed something?

Is overriding a chunk.region with a new region the only way to control the bounding box?

Python and Java API / Python API for Total Marker Error Calculation?
« on: October 16, 2017, 01:24:32 PM »
Is there any specific function or variable that can be used to get the Total Marker Error available in the reports?
I saw this post which provides Marker-wise Error ->

What is the relationship between Marker-wise Error from the above post and the Total Marker Error in the reports?
Madhav M.

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