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improved final formatting
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aedawid committed Sep 19, 2023
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29 changes: 14 additions & 15 deletions IntroPhotogrammetry/OpenDroneMap/03-ODM-georeferencing.md
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Expand Up @@ -1075,27 +1075,26 @@ Match found: GCP 143 (d=7.09m) is likely in image R0036933_7.JPG with ArUco mark

* ***You might be curious about the success rate of matching GCPs with image GPS.***<br> Thankfully, I got reference data where GCPs were paired with ArUco codes during land surveying. As you can see below, the `gcp_to_aruco_mapper.py` accurately matched all GCPs with their corresponding ArUco markers. Thus, <b>this method serves as a reliable fallback when you're unsure of the ArUco IDs for your ground control coordinates.</b>
```
# programmatic detection | reference created during land surveying
GCP 131 (d=16.84m) with ArUco marker 0 | 0 523287.368 4779588.335 1397.823 131
GCP 132 (d=12.69m) with ArUco marker 11 | 11 523289.018 4779469.252 1407.142 132
GCP 133 (d=1.64m) with ArUco marker 3 | 3 523363.938 4779530.027 1400.244 133
GCP 134 (d=1.00m) with ArUco marker 1 | 1 523394.376 4779529.525 1398.728 134
GCP 135 (d=3.09m) with ArUco marker 10 | 10 523305.976 4779572.588 1397.817 135
GCP 136 (d=18.49m) with ArUco marker 2 | 2 523350.181 4779492.395 1403.140 136
GCP 137 (d=25.80m) with ArUco marker 6 | 6 523347.074 4779571.424 1397.653 137
GCP 138 (d=15.18m) with ArUco marker 5 | 5 523329.480 4779525.642 1400.983 138
GCP 139 (d=4.29m) with ArUco marker 8 | 8 523292.432 4779530.710 1401.051 139
GCP 141 (d=5.95m) with ArUco marker 4 | 4 523364.648 4779587.932 1395.735 141
GCP 143 (d=7.09m) with ArUco marker 7 | 7 523261.422 4779532.114 1401.978 143
# programmatic detection | reference created during land surveying
GCP 131 (d=16.84m) with ArUco marker 0 | 0 523287.368 4779588.335 1397.823 131
GCP 132 (d=12.69m) with ArUco marker 11 | 11 523289.018 4779469.252 1407.142 132
GCP 133 (d=1.64m) with ArUco marker 3 | 3 523363.938 4779530.027 1400.244 133
GCP 134 (d=1.00m) with ArUco marker 1 | 1 523394.376 4779529.525 1398.728 134
GCP 135 (d=3.09m) with ArUco marker 10 | 10 523305.976 4779572.588 1397.817 135
GCP 136 (d=18.49m) with ArUco marker 2 | 2 523350.181 4779492.395 1403.140 136
GCP 137 (d=25.80m) with ArUco marker 6 | 6 523347.074 4779571.424 1397.653 137
GCP 138 (d=15.18m) with ArUco marker 5 | 5 523329.480 4779525.642 1400.983 138
GCP 139 (d=4.29m) with ArUco marker 8 | 8 523292.432 4779530.710 1401.051 139
GCP 141 (d=5.95m) with ArUco marker 4 | 4 523364.648 4779587.932 1395.735 141
GCP 143 (d=7.09m) with ArUco marker 7 | 7 523261.422 4779532.114 1401.978 143
```

<div style="background: #cff4fc; padding: 15px; margin-bottom: 25px; margin-left: 37px;">
<span style="font-weight:800;">PRO TIP:</span>
<br><span style="font-style:italic;">
<b>Always create a GCP-to-ArUco reference during land surveying.</b> This crucial step simplifies your geospatial analysis and georeferencing, allowing you to easily adhere to the guidelines outlined in [SCENARIO 1: GCP file with known ArUco IDs](#scenario-1-gcp-file-with-known-aruco-ids).
<b>Always create a GCP-to-ArUco reference during land surveying.</b> This crucial step simplifies your geospatial analysis and georeferencing, allowing you to easily adhere to the guidelines outlined in <a href="https://geospatial.101workbook.org/IntroPhotogrammetry/OpenDroneMap/03-ODM-georeferencing#scenario-1-gcp-file-with-known-aruco-ids">SCENARIO 1: GCP file with known ArUco IDs</a>.
</span>
</div><br>

</div>

**STEP 3.** Once the matches are made, create a **new** `GCP_reference.txt` file replacing the custom IDs with ArUco IDs.

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