I have a GeoTiff image consisting of 400 Ground control points.
I have now extracted all of these points into one string so that I can implement it into gdal_translate.
print gcp_string
-gcp 0.0 0.0 68.7535734331 81.6383694455 -gcp 524.0 0.0 67.8801524103 81.7775083606 -gcp 1048.0 0.0 66.9770925387 81.9146972712 -gcp 1572.0 0.0 66.0433103806 82.0498354298 -gcp 2096.0 0.0 65.0777120396 82.1828165964 -gcp 2620.0 0.0 64.0791988218 82.3135289263 -gcp 3144.0 0.0 63.0466743807 82.4418548213 -gcp 3668.0 0.0 61.9790532927 82.5676707895 -gcp 4192.0 0.0 60.875271098 82.6908473352 -gcp 4716.0 0.0 59.7342958801 82.8112488932 -gcp 5240.0 0.0 58.5551414743 82.9287338201 -gcp 5764.0 0.0 57.3368823882 83.0431544508 -gcp 6288.0 0.0 56.0786704967 83.1543572296 -gcp 6812.0 0.0 54.7797535304 83.2621829288 -gcp 7336.0 0.0 53.439495322 83.3664669648 -gcp 7860.0 0.0 52.0573976933 83.4670398266 -gcp 8384.0 0.0 50.6331237731 83.5637276304 -gcp 8908.0 0.0 49.1665224157 83.6563528125 -gcp 9432.0 0.0 47.6576532586 83.7447349757 -gcp 9956.0 0.0 46.1068118075 83.8286918967 -gcp 10464.0 0.0 44.5637779475 83.9056878166 -gcp 0.0 500.0 67.8290425489 81.5159728482 -gcp 524.0 500.0 66.9537649982 81.6531515131 -gcp 1048.0 500.0 66.0496675184 81.7883450613 -gcp 1572.0 500.0 65.115755027 81.9214540281 -gcp 2096.0 500.0 64.1510283635 82.0523737882 -gcp 2620.0 500.0 63.1544899931 82.1809944799 -gcp 3144.0 500.0 62.1251510895 82.307200898 -gcp 3668.0 500.0 61.0620399152 82.4308723944 -gcp 4192.0 500.0 59.9642115043 82.5518828121 -gcp 4716.0 500.0 58.8307586902 82.670100464 -gcp 5240.0 500.0 57.6608245322 82.7853881671 -gcp 5764.0 500.0 56.4536161913 82.8976033405 -gcp 6288.0 500.0 55.2084202793 83.0065981759 -gcp 6812.0 500.0 53.9246196708 83.1122198889 -gcp 7336.0 500.0 52.60171171 83.2143110618 -gcp 7860.0 500.0 51.2393276789 83.3127100894 -gcp 8384.0 500.0 49.8372533053 83.4072517379 -gcp 8908.0 500.0 48.3954499916 83.4977678292 -gcp 9432.0 500.0 46.9140763306 83.5840880581 -gcp 9956.0 500.0 45.3935093542 83.6660409529 -gcp 10464.0 500.0 43.8825354738 83.7411600321 -gcp 0.0 1000.0 66.9303477723 81.3915362591 -gcp 524.0 1000.0 66.0540923882 81.5267816886 -gcp 1048.0 1000.0 65.1498417108 81.6600102582 -gcp 1572.0 1000.0 64.2166840492 81.7911239623 -gcp 2096.0 1000.0 63.2537091299 81.9200199591 -gcp 2620.0 1000.0 62.2600137546 82.0465905288 -gcp 3144.0 1000.0 61.2347087331 82.1707230017 -gcp 3668.0 1000.0 60.1769269872 82.2922996966 -gcp 4192.0 1000.0 59.0858328039 82.411197892 -gcp 4716.0 1000.0 57.9606322542 82.5272898423 -gcp 5240.0 1000.0 56.8005848054 82.6404428483 -gcp 5764.0 1000.0 55.6050161477 82.7505193891 -gcp 6288.0 1000.0 54.3733322341 82.8573773222 -gcp 6812.0 1000.0 53.105034499 82.9608701599 -gcp 7336.0 1000.0 51.7997361708 83.0608474297 -gcp 7860.0 1000.0 50.4571795323 83.1571551284 -gcp 8384.0 1000.0 49.0772539111 83.2496362783 -gcp 8908.0 1000.0 47.660014095 83.3381315945 -gcp 9432.0 1000.0 46.2056987722 83.4224802701 -gcp 9956.0 1000.0 44.7147484998 83.5025208855 -gcp 10464.0 1000.0 43.2349706924 83.575852614 -gcp 0.0 1500.0 66.0562624411 81.2652281601 -gcp 524.0 1500.0 65.1798186215 81.3985678027 -gcp 1048.0 1500.0 64.2762046188 81.5298619773 -gcp 1572.0 1500.0 63.3445871261 81.6590142925 -gcp 2096.0 1500.0 62.3841389562 81.7859238343 -gcp 2620.0 1500.0 61.3940445817 81.910485155 -gcp 3144.0 1500.0 60.3735068502 82.0325882324 -gcp 3668.0 1500.0 59.3217547512 82.1521184418 -gcp 4192.0 1500.0 58.2380521924 82.2689565592 -gcp 4716.0 1500.0 57.1217077779 82.3829788089 -gcp 5240.0 1500.0 55.972085597 82.4940569643 -gcp 5764.0 1500.0 54.7886170218 82.6020585067 -gcp 6288.0 1500.0 53.5708134937 82.7068468478 -gcp 6812.0 1500.0 52.3182802486 82.808281624 -gcp 7336.0 1500.0 51.0307308855 82.9062190672 -gcp 7860.0 1500.0 49.7080026304 83.0005124606 -gcp 8384.0 1500.0 48.3500720825 83.0910126858 -gcp 8908.0 1500.0 46.9570711596 83.1775688687 -gcp 9432.0 1500.0 45.529302878 83.2600291295 -gcp 9956.0 1500.0 44.0672565219 83.3382414392 -gcp 10464.0 1500.0 42.6177788387 83.4098673173 -gcp 0.0 2000.0 65.2076466939 81.1368878868 -gcp 524.0 2000.0 64.3317864306 81.2683537599 -gcp 1048.0 2000.0 63.4295783029 81.3977488235 -gcp 1572.0 2000.0 62.5002625258 81.5249784145 -gcp 2096.0 2000.0 61.5430893838 81.6499436548 -gcp 2620.0 2000.0 60.5573246034 81.7725414655 -gcp 3144.0 2000.0 59.5422558052 81.8926645536 -gcp 3668.0 2000.0 58.497199895 82.0102014113 -gcp 4192.0 2000.0 57.4215113339 82.1250363458 -gcp 4716.0 2000.0 56.3145912659 82.237049554 -gcp 5240.0 2000.0 55.1758974908 82.3461172461 -gcp 5764.0 2000.0 54.0049552687 82.4521118251 -gcp 6288.0 2000.0 52.8013689217 82.5549021269 -gcp 6812.0 2000.0 51.5648341719 82.6543537249 -gcp 7336.0 2000.0 50.2951511175 82.7503293053 -gcp 7860.0 2000.0 48.9922376995 82.8426891192 -gcp 8384.0 2000.0 47.6561434588 82.931291516 -gcp 8908.0 2000.0 46.2870633219 83.0159935648 -gcp 9432.0 2000.0 44.8853510851 83.096651766 -gcp 9956.0 2000.0 43.4515322019 83.1731228569 -gcp 10464.0 2000.0 42.031511307 83.2431273487 -gcp 0.0 2500.0 64.3805863174 81.0070873979 -gcp 524.0 2500.0 63.5059185671 81.1367053897 -gcp 1048.0 2500.0 62.6057168924 81.2642298487 -gcp 1572.0 2500.0 61.6792901495 81.3895679545 -gcp 2096.0 2500.0 60.7259605991 81.5126229617 -gcp 2620.0 2500.0 59.7450690656 81.633294238 -gcp 3144.0 2500.0 58.7359810887 81.7514772762 -gcp 3668.0 2500.0 57.6980939116 81.8670637173 -gcp 4192.0 2500.0 56.6308442323 81.9799414038 -gcp 4716.0 2500.0 55.5337166829 82.0899944759 -gcp 5240.0 2500.0 54.4062530112 82.1971035145 -gcp 5764.0 2500.0 53.2480619403 82.3011457367 -gcp 6288.0 2500.0 52.0588296626 82.4019952471 -gcp 6812.0 2500.0 50.8383309022 82.4995233494 -gcp 7336.0 2500.0 49.5864404467 82.5935989214 -gcp 7860.0 2500.0 48.303145006 82.684088859 -gcp 8384.0 2500.0 46.9885552132 82.7708585935 -gcp 8908.0 2500.0 45.6429175257 82.8537726857 -gcp 9432.0 2500.0 44.2666257315 82.9326954996 -gcp 9956.0 2500.0 42.8602317106 83.0074919573 -gcp 10464.0 2500.0 41.4687221962 83.0759389265 -gcp 0.0 3000.0 63.5792898678 80.8751553883 -gcp 524.0 3000.0 62.7065052858 81.0029642566 -gcp 1048.0 3000.0 61.8089927381 81.1286599088 -gcp 1572.0 3000.0 60.8861249887 81.2521514645 -gcp 2096.0 3000.0 59.9372909484 81.3733443948 -gcp 2620.0 3000.0 58.9619005895 81.4921405823 -gcp 3144.0 3000.0 57.9593907701 81.6084383537 -gcp 3668.0 3000.0 56.9292318043 81.722132524 -gcp 4192.0 3000.0 55.8709346914 81.833114469 -gcp 4716.0 3000.0 54.784058957 81.9412722389 -gcp 5240.0 3000.0 53.6682210748 82.0464907162 -gcp 5764.0 3000.0 52.5231034334 82.1486518225 -gcp 6288.0 3000.0 51.3484638007 82.2476347773 -gcp 6812.0 3000.0 50.1441452186 82.3433164111 -gcp 7336.0 3000.0 48.9100862298 82.4355715369 -gcp 7860.0 3000.0 47.6463313039 82.5242733832 -gcp 8384.0 3000.0 46.3530412916 82.6092940915 -gcp 8908.0 3000.0 45.0305036878 82.6905052826 -gcp 9432.0 3000.0 43.6791424401 82.7677786916 -gcp 9956.0 3000.0 42.2995269923 82.8409868742 -gcp 10464.0 3000.0 40.9357458421 82.9079598268 -gcp 0.0 3500.0 62.794402403 80.7424598837 -gcp 524.0 3500.0 61.9239077668 80.8684756664 -gcp 1048.0 3500.0 61.0294739276 80.9923608044 -gcp 1572.0 3500.0 60.1105333541 81.1140263579 -gcp 2096.0 3500.0 59.1665368713 81.2333800145 -gcp 2620.0 3500.0 58.1969583301 81.3503261631 -gcp 3144.0 3500.0 57.2013001089 81.4647659436 -gcp 3668.0 3500.0 56.1790992718 81.5765973056 -gcp 4192.0 3500.0 55.1299342916 81.6857150974 -gcp 4716.0 3500.0 54.0534322833 81.792011192 -gcp 5240.0 3500.0 52.9492767092 81.8953746561 -gcp 5764.0 3500.0 51.8172155165 81.9956919643 -gcp 6288.0 3500.0 50.6570696565 82.0928472621 -gcp 6812.0 3500.0 49.4687419201 82.1867226776 -gcp 7336.0 3500.0 48.2522259935 82.2771986862 -gcp 7860.0 3500.0 47.0076156131 82.3641545308 -gcp 8384.0 3500.0 45.7351136602 82.4474686986 -gcp 8908.0 3500.0 44.4350410003 82.5270194587 -gcp 9432.0 3500.0 43.1078448303 82.6026854604 -gcp 9956.0 3500.0 41.7541062592 82.6743463922 -gcp 10464.0 3500.0 40.4170448829 82.7398836608 -gcp 0.0 4000.0 62.0352174853 80.6075808332 -gcp 524.0 4000.0 61.1676183384 80.7318483408 -gcp 1048.0 4000.0 60.2768579869 80.8539703523 -gcp 1572.0 4000.0 59.3624239295 80.9738599976 -gcp 2096.0 4000.0 58.4238238368 81.0914272773 -gcp 2620.0 4000.0 57.460589936 81.2065791558 -gcp 3144.0 4000.0 56.4722841645 81.3192196269 -gcp 3668.0 4000.0 55.4585039073 81.4292497885 -gcp 4192.0 4000.0 54.4188882191 81.5365679447 -gcp 4716.0 4000.0 53.353124469 81.6410697425 -gcp 5240.0 4000.0 52.2609553668 81.7426483497 -gcp 5764.0 4000.0 51.1421863258 81.8411946742 -gcp 6288.0 4000.0 49.9966931137 81.9365976268 -gcp 6812.0 4000.0 48.8244297253 82.0287444305 -gcp 7336.0 4000.0 47.6254363886 82.1175209758 -gcp 7860.0 4000.0 46.3998475923 82.2028122254 -gcp 8384.0 4000.0 45.1478999907 82.2845026707 -gcp 8908.0 4000.0 43.8699400088 82.3624768398 -gcp 9432.0 4000.0 42.5664309394 82.4366198593 -gcp 9956.0 4000.0 41.2379592875 82.5068180697 -gcp 10464.0 4000.0 39.9268954797 82.5710012085 -gcp 0.0 4500.0 61.2921133836 80.4718994224 -gcp 524.0 4500.0 60.4277335918 80.5944405548 -gcp 1048.0 4500.0 59.5409531588 80.7148229016 -gcp 1572.0 4500.0 58.6313103043 80.8329617503 -gcp 2096.0 4500.0 57.6983649534 80.9487694709 -gcp 2620.0 4500.0 56.7417028061 81.0621556309 -gcp 3144.0 4500.0 55.760940128 81.1730270787 -gcp 3668.0 4500.0 54.7557290669 81.2812880343 -gcp 4192.0 4500.0 53.7257633861 81.3868402034 -gcp 4716.0 4500.0 52.6707845494 81.489582925 -gcp 5240.0 4500.0 51.5905881101 81.5894133548 -gcp 5764.0 4500.0 50.4850303578 81.6862266881 -gcp 6288.0 4500.0 49.3540351758 81.7799164223 -gcp 6812.0 4500.0 48.1976010443 81.8703746602 -gcp 7336.0 4500.0 47.0158081083 81.957492456 -gcp 7860.0 4500.0 45.8088252078 82.0411602043 -gcp 8384.0 4500.0 44.576916738 82.1212680743 -gcp 8908.0 4500.0 43.3204491852 82.1977064911 -gcp 9432.0 4500.0 42.0398971475 82.2703666619 -gcp 9956.0 4500.0 40.7358486281 82.3391411497 -gcp 10464.0 4500.0 39.4498531331 82.4020064522 -gcp 0.0 5000.0 60.5779414802 80.3335201748 -gcp 524.0 5000.0 59.717457033 80.4543842124 -gcp 1048.0 5000.0 58.8353133417 80.5730804959 -gcp 1572.0 5000.0 57.931096575 80.6895262319 -gcp 2096.0 5000.0 57.0044153843 80.8036359867 -gcp 2620.0 5000.0 56.0549047722 80.9153217949 -gcp 3144.0 5000.0 55.0822305977 81.0244932428 -gcp 3668.0 5000.0 54.0860945315 81.1310575609 -gcp 4192.0 5000.0 53.0662393545 81.2349197411 -gcp 4716.0 5000.0 52.0224545359 81.335982686 -gcp 5240.0 5000.0 50.9545820434 81.434147393 -gcp 5764.0 5000.0 49.8625223426 81.5293131753 -gcp 6288.0 5000.0 48.7462405403 81.6213779193 -gcp 6812.0 5000.0 47.6057726113 81.7102383798 -gcp 7336.0 5000.0 46.4412316361 81.7957905127 -gcp 7860.0 5000.0 45.252813956 81.8779298467 -gcp 8384.0 5000.0 44.040805128 81.9565518954 -gcp 8908.0 5000.0 42.8055855407 82.0315526093 -gcp 9432.0 5000.0 41.5476355229 82.1028288692 -gcp 9956.0 5000.0 40.267539755 82.1702790194 -gcp 10464.0 5000.0 39.0060427302 82.2319228155 -gcp 0.0 5500.0 59.8817175279 80.1940067042 -gcp 524.0 5500.0 59.0254148668 80.3132278596 -gcp 1048.0 5500.0 58.1481787834 80.4302731613 -gcp 1572.0 5500.0 57.2496387552 80.5450619563 -gcp 2096.0 5500.0 56.3294475153 80.6575111547 -gcp 2620.0 5500.0 55.3872846328 80.7675353496 -gcp 3144.0 5500.0 54.4228606872 80.875046911 -gcp 3668.0 5500.0 53.4359218413 80.9799560866 -gcp 4192.0 5500.0 52.4262547065 81.0821711252 -gcp 4716.0 5500.0 51.3936914311 81.1815984299 -gcp 5240.0 5500.0 50.3381149655 81.278142744 -gcp 5764.0 5500.0 49.2594644631 81.3717073702 -gcp 6288.0 5500.0 48.1577407701 81.4621944232 -gcp 6812.0 5500.0 47.0330119529 81.549505116 -gcp 7336.0 5500.0 45.8854187955 81.6335400802 -gcp 7860.0 5500.0 44.7151801805 81.7141997213 -gcp 8384.0 5500.0 43.5225982528 81.7913846076 -gcp 8908.0 5500.0 42.3080632379 81.8649958971 -gcp 9432.0 5500.0 41.0720577681 81.9349357978 -gcp 9956.0 5500.0 39.8151605463 82.001108064 -gcp 10464.0 5500.0 38.5773368063 82.0615739707 -gcp 0.0 6000.0 59.2077530556 80.0527120728 -gcp 524.0 6000.0 58.3560363512 80.1703321357 -gcp 1048.0 6000.0 57.4840929939 80.2857705193 -gcp 1572.0 6000.0 56.5915923179 80.3989486987 -gcp 2096.0 6000.0 55.6782273943 80.5097859073 -gcp 2620.0 6000.0 54.7437183376 80.6181992649 -gcp 3144.0 6000.0 53.7878161652 80.7241038787 -gcp 3668.0 6000.0 52.8103070111 80.8274129504 -gcp 4192.0 6000.0 51.8110165844 80.928037903 -gcp 4716.0 6000.0 50.789814804 81.0258885365 -gcp 5240.0 6000.0 49.7466205644 81.1208732129 -gcp 5764.0 6000.0 48.6814065895 81.2128990725 -gcp 6288.0 6000.0 47.5942043352 81.3018722801 -gcp 6812.0 6000.0 46.4851088918 81.3876983017 -gcp 7336.0 6000.0 45.3542838238 81.4702822117 -gcp 7860.0 6000.0 44.2019658741 81.5495290304 -gcp 8384.0 6000.0 43.0284694378 81.6253440925 -gcp 8908.0 6000.0 41.8341906949 81.6976334471 -gcp 9432.0 6000.0 40.6196112686 81.7663042884 -gcp 9956.0 6000.0 39.38530126 81.8312654174 -gcp 10464.0 6000.0 38.1704677934 81.890617253 -gcp 0.0 6500.0 58.5448406714 79.9111816492 -gcp 524.0 6500.0 57.6978395574 80.0272135547 -gcp 1048.0 6500.0 56.8312951977 80.1410592098 -gcp 1572.0 6500.0 55.9449138588 80.2526421686 -gcp 2096.0 6500.0 55.0384258067 80.3618839327 -gcp 2620.0 6500.0 54.1115883629 80.4687040847 -gcp 3144.0 6500.0 53.1641894708 80.5730203936 -gcp 3668.0 6500.0 52.1960515759 80.6747489251 -gcp 4192.0 6500.0 51.207035709 80.7738041715 -gcp 4716.0 6500.0 50.1970457054 80.8700992068 -gcp 5240.0 6500.0 49.1660325127 80.9635458708 -gcp 5764.0 6500.0 48.113998552 81.0540549805 -gcp 6288.0 6500.0 47.041002091 81.1415365694 -gcp 6812.0 6500.0 45.9471615882 81.2259001546 -gcp 7336.0 6500.0 44.8326599507 81.30705503 -gcp 7860.0 6500.0 43.6977486417 81.3849105874 -gcp 8384.0 6500.0 42.5427515518 81.4593766644 -gcp 8908.0 6500.0 41.3680685362 81.5303639199 -gcp 9432.0 6500.0 40.1741784991 81.5977842367 -gcp 9956.0 6500.0 38.961641891 81.6615511506 -gcp 10464.0 6500.0 37.7689357861 81.7198034764 -gcp 0.0 7000.0 57.90496546 79.7676964585 -gcp 524.0 7000.0 57.063055461 79.8821875891 -gcp 1048.0 7000.0 56.2022666946 79.9944899945 -gcp 1572.0 7000.0 55.3223391947 80.1045293034 -gcp 2096.0 7000.0 54.4230370544 80.2122292686 -gcp 2620.0 7000.0 53.5041512395 80.317511904 -gcp 3144.0 7000.0 52.5655028768 80.4202975932 -gcp 3668.0 7000.0 51.6069468197 80.5205052021 -gcp 4192.0 7000.0 50.6283753823 80.6180522094 -gcp 4716.0 7000.0 49.6297221733 80.7128548614 -gcp 5240.0 7000.0 48.6109659878 80.8048283524 -gcp 5764.0 7000.0 47.5721347193 80.8938870314 -gcp 6288.0 7000.0 46.5133092591 80.9799446333 -gcp 6812.0 7000.0 45.4346273418 81.0629145355 -gcp 7336.0 7000.0 44.3362872906 81.1427100377 -gcp 7860.0 7000.0 43.2185516011 81.2192446664 -gcp 8384.0 7000.0 42.0817502912 81.2924325023 -gcp 8908.0 7000.0 40.9262839266 81.3621885333 -gcp 9432.0 7000.0 39.7526262177 81.4284290297 -gcp 9956.0 7000.0 38.5613260662 81.4910719437 -gcp 10464.0 7000.0 37.3901493391 81.548292049 -gcp 0.0 7500.0 57.2801688332 79.6233376655 -gcp 524.0 7500.0 56.4435348341 79.7363147215 -gcp 1048.0 7500.0 55.5886647864 79.847102006 -gcp 1572.0 7500.0 54.7153298091 79.9556271805 -gcp 2096.0 7500.0 53.8233249741 80.0618161997 -gcp 2620.0 7500.0 52.9124718949 80.1655934499 -gcp 3144.0 7500.0 51.9826217581 80.2668818582 -gcp 3668.0 7500.0 51.0336585981 80.3656030064 -gcp 4192.0 7500.0 50.0655027094 80.4616772607 -gcp 4716.0 7500.0 49.0781141297 80.5550239246 -gcp 5240.0 7500.0 48.0714961519 80.6455614152 -gcp 5764.0 7500.0 47.0456988323 80.733207464 -gcp 6288.0 7500.0 46.000822464 80.8178793402 -gcp 6812.0 7500.0 44.9370209799 80.899494096 -gcp 7336.0 7500.0 43.8545052441 80.9779688334 -gcp 7860.0 7500.0 42.7535461772 81.0532209923 -gcp 8384.0 7500.0 41.6344776511 81.125168659 -gcp 8908.0 7500.0 40.4976990733 81.1937308971 -gcp 9432.0 7500.0 39.3436775663 81.2588280976 -gcp 9956.0 7500.0 38.1729496324 81.3203823506 -gcp 10464.0 7500.0 37.0225930688 81.3766030924 -gcp 0.0 8000.0 56.6725834492 79.4777762405 -gcp 524.0 8000.0 55.8414293366 79.5892744511 -gcp 1048.0 8000.0 54.9926622587 79.6985830897 -gcp 1572.0 8000.0 54.1260815494 79.8056318722 -gcp 2096.0 8000.0 53.2415103246 79.9103489525 -gcp 2620.0 8000.0 52.3387978392 80.0126610641 -gcp 3144.0 8000.0 51.417822262 80.112493634 -gcp 3668.0 8000.0 50.4784936725 80.2097708968 -gcp 4192.0 8000.0 49.5207571693 80.3044160249 -gcp 4716.0 8000.0 48.544596028 80.3963512794 -gcp 5240.0 8000.0 47.5500348649 80.4854981824 -gcp 5764.0 8000.0 46.5371427791 80.5717777119 -gcp 6288.0 8000.0 45.5060364423 80.6551105166 -gcp 6812.0 8000.0 44.4568831081 80.7354171508 -gcp 7336.0 8000.0 43.3899035008 80.8126183284 -gcp 7860.0 8000.0 42.305374539 80.8866351953 -gcp 8384.0 8000.0 41.2036318345 80.9573896198 -gcp 8908.0 8000.0 40.0850718958 81.0248045027 -gcp 9432.0 8000.0 38.9501539506 81.0888041045 -gcp 9956.0 8000.0 37.7994012898 81.1493143908 -gcp 10464.0 8000.0 36.6692245314 81.204577885 -gcp 0.0 8500.0 56.079679703 79.3313273648 -gcp 524.0 8500.0 55.2541574309 79.4413742996 -gcp 1048.0 8500.0 54.4116236827 79.5492332017 -gcp 1572.0 8500.0 53.5519037554 79.6548357795 -gcp 2096.0 8500.0 52.6748464175 79.7581123206 -gcp 2620.0 8500.0 51.7803260583 79.858991835 -gcp 3144.0 8500.0 50.8682452316 79.9574021695 -gcp 3668.0 8500.0 49.9385373983 80.0532701216 -gcp 4192.0 8500.0 48.9911697598 80.1465215682 -gcp 4716.0 8500.0 48.026146119 80.2370816133 -gcp 5240.0 8500.0 47.0435097312 80.3248747561 -gcp 5764.0 8500.0 46.0433461163 80.4098250784 -gcp 6288.0 8500.0 45.0257858065 80.4918564521 -gcp 6812.0 8500.0 43.9910070056 80.5708927626 -gcp 7336.0 8500.0 42.9392381235 80.6468581504 -gcp 7860.0 8500.0 41.8707601472 80.7196772684 -gcp 8384.0 8500.0 40.7859087959 80.7892755557 -gcp 8908.0 8500.0 39.6850763958 80.8555795271 -gcp 9432.0 8500.0 38.568713398 80.9185170794 -gcp 9956.0 8500.0 37.4373294503 80.9780178125 -gcp 10464.0 8500.0 36.3266891984 81.0323561042 -gcp 0.0 9000.0 55.5022478885 79.1838511901 -gcp 524.0 9000.0 54.6825084225 79.2924782872 -gcp 1048.0 9000.0 53.846338485 79.3989201095 -gcp 1572.0 9000.0 52.9935870915 79.5031103214 -gcp 2096.0 9000.0 52.1241263309 79.6049812984 -gcp 2620.0 9000.0 51.2378533203 79.7044642701 -gcp 3144.0 9000.0 50.3346925336 79.8014894344 -gcp 3668.0 9000.0 49.4145983092 79.8959860711 -gcp 4192.0 9000.0 48.4775574301 79.9878826683 -gcp 4716.0 9000.0 47.5235917148 80.0771070664 -gcp 5240.0 9000.0 46.5527605843 80.1635866211 -gcp 5764.0 9000.0 45.565163577 80.2472483846 -gcp 6288.0 9000.0 44.5609427915 80.3280193037 -gcp 6812.0 9000.0 43.540285234 80.4058264335 -gcp 7336.0 9000.0 42.5034250412 80.4805971663 -gcp 7860.0 9000.0 41.4506455424 80.5522594748 -gcp 8384.0 9000.0 40.3822811155 80.6207421693 -gcp 8908.0 9000.0 39.2987187787 80.6859751692 -gcp 9432.0 9000.0 38.2003994486 80.7478897888 -gcp 9956.0 9000.0 37.087818783 80.8064190361 -gcp 10464.0 9000.0 35.9961152692 80.8598678099 -gcp 0.0 9500.0 54.9397653544 79.0353890365 -gcp 524.0 9500.0 54.125937975 79.1426272515 -gcp 1048.0 9500.0 53.2962409263 79.247684073 -gcp 1572.0 9500.0 52.4505448665 79.3504950831 -gcp 2096.0 9500.0 51.5887430586 79.450994696 -gcp 2620.0 9500.0 50.7107531445 79.5491163023 -gcp 3144.0 9500.0 49.8165192726 79.6447923817 -gcp 3668.0 9500.0 48.9060143897 79.7379546156 -gcp 4192.0 9500.0 47.9792425879 79.8285340105 -gcp 4716.0 9500.0 47.036241451 79.9164610387 -gcp 5240.0 9500.0 46.0770843628 80.0016657955 -gcp 5764.0 9500.0 45.1018827561 80.0840781738 -gcp 6288.0 9500.0 44.1107882824 80.1636280536 -gcp 6812.0 9500.0 43.1039948831 80.2402455054 -gcp 7336.0 9500.0 42.0817407372 80.3138610077 -gcp 7860.0 9500.0 41.0443100529 80.3844056758 -gcp 8384.0 9500.0 39.9920346643 80.4518115042 -gcp 8908.0 9500.0 38.9252953787 80.5160116207 -gcp 9432.0 9500.0 37.8445230137 80.5769405529 -gcp 9956.0 9500.0 36.7501990464 80.6345345075 -gcp 10464.0 9500.0 35.6768549591 80.6871276444 -gcp 0.0 9990.0 54.4025238585 78.8889705051 -gcp 524.0 9990.0 53.5945947544 78.9948775464 -gcp 1048.0 9990.0 52.7713266458 79.0986079375 -gcp 1572.0 9990.0 51.9326094649 79.2000991134 -gcp 2096.0 9990.0 51.0783552578 79.2992874484 -gcp 2620.0 9990.0 50.2084997845 79.3961084 -gcp 3144.0 9990.0 49.3230044613 79.4904966223 -gcp 3668.0 9990.0 48.4218584532 79.5823860766 -gcp 4192.0 9990.0 47.5050808116 79.6717101527 -gcp 4716.0 9990.0 46.5727225988 79.7584018057 -gcp 5240.0 9990.0 45.6248689685 79.8423937078 -gcp 5764.0 9990.0 44.6616411785 79.9236184165 -gcp 6288.0 9990.0 43.6831985211 80.0020085559 -gcp 6812.0 9990.0 42.6897401535 80.0774970108 -gcp 7336.0 9990.0 41.681506807 80.1500171321 -gcp 7860.0 9990.0 40.6587823467 80.2195029541 -gcp 8384.0 9990.0 39.6218951463 80.2858894218 -gcp 8908.0 9990.0 38.5712192291 80.3491126296 -gcp 9432.0 9990.0 37.5071751196 80.4091100709 -gcp 9956.0 9990.0 36.4302303342 80.4658208975 -gcp 10464.0 9990.0 35.374339434 80.5176067893
Now, I have one.tif from which I have extracted all the GCP's into one string above.
And now I want to add all these GCP's into two.tif where there are no GCP's
C:\>gdalinfo C:\Users\Gurminder\Documents\Git\Dump\two.tif
Driver: GTiff/GeoTIFF
Files: C:\Users\Gurminder\Documents\Git\Dump\two.tif
C:\Users\Gurminder\Documents\Git\Dump\two.tif.aux.xml
Size is 10465, 9991
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Metadata:
AREA_OR_POINT=Area
TIFFTAG_DATETIME=2016:07:25 04:52:55
TIFFTAG_IMAGEDESCRIPTION=Sentinel-1A EW GRD MR L1
TIFFTAG_SOFTWARE=Sentinel-1 IPF 002.71
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 9991.0)
Upper Right (10465.0, 0.0)
Lower Right (10465.0, 9991.0)
Center ( 5232.5, 4995.5)
Band 1 Block=10465x1 Type=Float32, ColorInterp=Gray
Min=0.000 Max=35.000
Minimum=0.000, Maximum=35.000, Mean=2.314, StdDev=2.009
NoData Value=-99.989999999999995
Metadata:
STATISTICS_MAXIMUM=35
STATISTICS_MEAN=2.314333019542
STATISTICS_MINIMUM=0
STATISTICS_STDDEV=2.0089220490694
How do I add the GCP's in two.tiff with my gcp_string variable?
Answer
you can use gdal_edit.py for this:
gdal_edit.py -gcp 0.0 0.0 68.7535734331 81.6383694455 two.tiff
With gdal_translate you can also do it but have to write a third file:
gdal_translate -gcp 0.0 0.0 68.7535734331 81.6383694455 two.tiff three.tiff
Within Python you could do:
import os
os.system('gdal_edit.py {} two.tiff'.format(gcp_string))
Or if you want to do it in a more pythonic way (adapted from gdal_edit.py):
from osgeo import gdal
gcp_items = filter(None, gcp_string.split("-gcp"))
gcp_list = []
for item in gcp_items:
pixel, line, x, y = map(float, item.split())
z = 0
gcp = gdal.GCP(x, y, z, pixel, line)
gcp_list.append(gcp)
ds = gdal.Open("two.tiff", gdal.GA_Update)
wkt = ds.GetProjection()
ds.SetGCPs(gcp_list, wkt)
ds = None
Note: this is assuming that the projection of one.tiff and two.tiff are the same. Otherwise you will have to get the wkt from one.tiff.
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