[GRASS-user] What's a GCP?

GRASS GRASS user
,
1

The r.in.gdal manual page mentions GCPs. This is a new acronym for me and I
cannot find a relevant definition in my web searches. For what do those
initials stand?

Regards,

Rich

2

Should be Ground Control Point(s)

C

···

Prof. Carlos Henrique Grohmann
Institute of Energy and Environment - Univ. of São Paulo, Brazil

  • Digital Terrain Analysis | GIS | Remote Sensing -

http://carlosgrohmann.com
http://orcid.org/0000-0001-5073-5572

Can’t stop the signal.

3

On Wed, 18 Sep 2019, Carlos Henrique Grohmann de Carvalho wrote:

Should be Ground Control Point(s)

Carlos,

I thought it was GPS related. Thanks for the definition.

Regards,

Rich

4

Hi, as stated by Carlos, GPCs are Ground Control Point(s). They are
used in georeferencing of aerial/satellite images without a coordinate
reference system. Basically are recognizable points in the image of
which the exact geographical position is known. Setting the coordinates
for these points is possible to associate the coordinate to the image.
Regards,

Andrea

Il giorno mer, 18/09/2019 alle 09.03 -0700, Rich Shepard ha scritto:

On Wed, 18 Sep 2019, Carlos Henrique Grohmann de Carvalho wrote:

> Should be Ground Control Point(s)

Carlos,

I thought it was GPS related. Thanks for the definition.

Regards,

Rich
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