western_sahara_rel_1989.jpg

https://legacy.lib.utexas.edu/maps/africa/western_sahara_rel_1989.jpg
#4223: Successfully georeferenced
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Georeferencing Error

Mean Absolute Error Root Mean Square Error Maximum Error
1.1%
1.1%
1.6%
8.832 pixels 9.349 pixels 13.576 pixels
9.443 km 9.993 km 14.726 km

🡇 Parameters

Estimated Transform

Type: Polynomial (1st order)
Coefficients:
Long = +0.010519x -0.000191y -18.592863
Lat = -0.000051x -0.009794y +31.721462

Control Points

🡇 CSV 🡇 GeoJSON

ID Name Longitude Latitude Source Residual (km)
196711 Guera -17.088918 20.832586 Auto 14.726 1.6%
196692 Zag -9.29397 28.022103 Auto 14.238 1.6%
196694 Cap Juby -12.929958 27.940116 Auto 13.096 1.5%
196706 Fdérik -12.728356 22.695266 Auto 10.980 1.2%
196693 Gomera -17.133333 28.1 Auto 10.462 1.2%
196707 Bir Gandús -16.450183 21.603356 Auto 9.767 1.1%
196704 Dakhla -15.94 23.71 Auto 9.439 1.1%
196708 Tichla -14.949097 21.582463 Auto 9.076 1.0%
196685 Goulimine -10.0700161147 28.9799739777 Auto 8.548 1.0%
196697 Ferro -17.9993 27.74196 Auto 7.909 0.9%
196712 Akjoujt -14.3909994818 19.7469990599 Auto 6.524 0.7%
196688 Tan Tan -11.1000307632 28.4303951202 Auto 4.068 0.5%
196710 Choum -13.061734 21.287496 Auto 3.932 0.4%
ID Name Longitude Latitude Source Residual (km)
196682 Cap Rhir -9.889300 30.629260 Auto
196683 Sidi Auto
196684 Lanzarote -13.605280 28.945560 Auto
196686 Palma -17.852870 28.695030 Auto
196687 Fuerteventura -14.030740 28.381130 Auto
196689 Cruz Auto
196690 Isla Auto
196691 Las Auto
196695 Tarfaya Auto
196696 Gran Canaria -15.600000 28.000000 Auto
196698 Hagunia Auto
196699 Semata Auto
196700 Cabo Auto
196701 Craa Auto
196702 Bir Auto
196703 Zemmur Auto
196705 Punta Durntord Auto
196709 Cabo Blanco -17.050250 20.770010 Auto
196713 MOROCCO Auto
196714 CANARY ISLANDS SPAIN Auto
196715 ALGERIA Auto
196716 SAGUIA 2.105300 13.464000 Auto
196717 HAMRA -9.523240 31.834080 Auto
196718 MAURITANIA Auto
196719 RIO Auto
196720 MAURITANIA Auto

About maplocate

Maplocate is a free map georeferencing service created by Karim Bahgat, with support from the William & Mary GeoLab.