Help defining GCPs

Hey!

I am trying to find a nice way to include my GCPs.
I have drone imagery of a smaller area, and in the images 20 GCPs can be seen.
Is there any way to make a GCP file if you do not know the pixel-locations of the GCPs in all images?

I have 190 images, and was hoping I could enter the GCPs using a list and then pinpoint the GCPs on the images, but whenever I load the GCP list, nothing shows up on the map in the GCP interface.

This is how the txt-file is written:

+proj=utm +zone=32 +ellps=WGS84 +datum=WGS84 +units=m +no_defs
1 6191911.2396 720011.6246 70.0759
2 6191905.8701 720000.8693 69.8998
3 6191897.1382 719986.9251 69.8468
4 6191886.7933 719969.1454 68.8231
5 6191903.0890 719955.7958 65.6968
6 6191913.6137 719974.3269 67.6222
7 6191925.8268 719990.2772 69.2957
8 6191940.0626 720008.1975 71.3900
9 6191968.3174 720004.6086 72.8505
10 6191963.3304 719980.2626 71.1053
11 6191955.0379 719953.5619 68.0145
12 6191948.0575 719929.2488 65.5628
13 6191976.1954 719921.4757 72.1985
14 6191989.8598 719956.1175 74.5508
15 6191995.6057 719984.1695 75.6310
16 6192000.9562 720011.3404 75.1848
17 6191979.4584 719990.4119 73.7619
18 6191966.1921 719959.0921 70.5920
19 6191917.7242 719993.5295 70.2841
20 6191910.3190 719955.1506 66.2567

I’ve also tried using WGS84 UTM 32N as header. but does not work either.

I am following the steps in this guide, but when loading in the text file nothing appears on the map.

Thanks!

I think you need to remove the IDs (1,2,3,4,etc.) column. The first column should be <geo_x>.

I’ve tried removing the ID’s, but nothing shows up on the map, still.

+proj=utm +zone=32 +ellps=WGS84 +datum=WGS84 +units=m +no_defs
6191911.2396 720011.6246 70.0759
6191905.8701 720000.8693 69.8998
6191897.1382 719986.9251 69.8468
6191886.7933 719969.1454 68.8231
6191903.0890 719955.7958 65.6968
6191913.6137 719974.3269 67.6222
6191925.8268 719990.2772 69.2957
6191940.0626 720008.1975 71.3900
6191968.3174 720004.6086 72.8505
6191963.3304 719980.2626 71.1053
6191955.0379 719953.5619 68.0145
6191948.0575 719929.2488 65.5628
6191976.1954 719921.4757 72.1985
6191989.8598 719956.1175 74.5508
6191995.6057 719984.1695 75.6310
6192000.9562 720011.3404 75.1848
6191979.4584 719990.4119 73.7619
6191966.1921 719959.0921 70.5920
6191917.7242 719993.5295 70.2841
6191910.3190 719955.1506 66.2567

The new file.

Quirks of the user interface (which needs to be improved).

Try adding a few columns and swap the x/y coordinates.

+proj=utm +zone=32 +ellps=WGS84 +datum=WGS84 +units=m +no_defs
720011.6246 6191911.2396 70.0759 0 0 0
720000.8693 6191905.8701 69.8998 0 0 0
719986.9251 6191897.1382 69.8468 0 0 0
719969.1454 6191886.7933 68.8231 0 0 0
719955.7958 6191903.0890 65.6968 0 0 0
719974.3269 6191913.6137 67.6222 0 0 0
719990.2772 6191925.8268 69.2957 0 0 0
720008.1975 6191940.0626 71.3900 0 0 0
720004.6086 6191968.3174 72.8505 0 0 0
719980.2626 6191963.3304 71.1053 0 0 0
719953.5619 6191955.0379 68.0145 0 0 0
719929.2488 6191948.0575 65.5628 0 0 0
719921.4757 6191976.1954 72.1985 0 0 0
719956.1175 6191989.8598 74.5508 0 0 0
719984.1695 6191995.6057 75.6310 0 0 0
720011.3404 6192000.9562 75.1848 0 0 0
719990.4119 6191979.4584 73.7619 0 0 0
719959.0921 6191966.1921 70.5920 0 0 0
719993.5295 6191917.7242 70.2841 0 0 0
719955.1506 6191910.3190 66.2567 0 0 0
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That works perfectly. Thanks!

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