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and Ice Sheets","monthly_downloads":41,"total_dependent_repos":1,"total_dependent_packages":0,"readme":"# PyTrx\n\u003ca href='https://pytrx.readthedocs.io/en/latest/?badge=latest'\u003e \u003cimg src='https://readthedocs.org/projects/pytrx/badge/?version=latest' alt='Documentation status' /\u003e\u003c/a\u003e \u003ca href=\"https://badge.fury.io/py/pytrx\"\u003e\u003cimg src=\"https://badge.fury.io/py/pytrx.svg\" alt=\"PyPI status\" height=\"18\"\u003e\u003c/a\u003e \u003ca href=\"https://zenodo.org/badge/latestdoi/91549468\"\u003e\u003cimg src=\"https://zenodo.org/badge/91549468.svg\" alt=\"DOI\"\u003e\u003c/a\u003e\u003cbr\u003e\n\nPyTrx (short for 'Python Tracking') is a Python object-oriented toolbox created for the purpose of calculating real-world measurements from oblique images and time-lapse image series. Its primary purpose is to obtain velocities, surface areas, and distances from imagery of glacial environments. \u003cbr\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePyTrx citations\u003c/h3\u003e\n\nWe are happy for others to use and adapt PyTrx for their own processing needs. If used, please cite the following key publication and Digital Object Identifier:\u003cbr\u003e\n\n\u003ch3\u003eHow et al. (2020) PyTrx: a Python-based monoscopic terrestrial photogrammetry toolset for glaciology. \u003ci\u003eFrontiers in Earth Science\u003c/i\u003e 8:21, \u003ca href=\"https://dx.doi.org/10.3389/feart.2020.00021\"\u003edoi:10.3389/feart.2020.00021\u003c/a\u003e\u003c/h3\u003e\n\nPyTrx has been used in the following publications. In addition to the publication above, please cite any that are applicable where possible:\u003cbr\u003e\n\n\u003cb\u003e*PyTrx used for georectification of glacier calving event locations*\u003c/b\u003e\u003cbr\u003e\nHow et al. (2019) Calving controlled by melt-undercutting: detailed mechanisms revealed through time-lapse observations. \u003ci\u003eAnnals of Glaciology\u003c/i\u003e 60 (78), 20-31, \u003ca href=\"https://dx.doi.org/10.1017/aog.2018.28\"\u003edoi:10.1017/aog.2018.28\u003c/a\u003e\u003cbr\u003e\n\n\u003cb\u003e*PhD thesis by Penelope How, for which PyTrx was developed primarily*\u003c/b\u003e\u003cbr\u003e\nHow (2018) Dynamical change at tidewater glaciers examined using time-lapse photogrammetry. PhD thesis, University of Edinburgh, UK, \u003ca href=\"https://hdl.handle.net/1842/31103\"\u003ehttps://hdl.handle.net/1842/31103\u003c/a\u003e\u003cbr\u003e\n\n\u003cb\u003e*PyTrx used for detection of supraglacial lakes and meltwater plumes*\u003c/b\u003e\u003cbr\u003e\nHow et al. (2017) Rapidly changing subglacial hydrological pathways at a tidewater glacier revealed through simultaneous observations of water pressure, supraglacial lakes, meltwater plumes and surface velocities. \u003ci\u003eThe Cryosphere\u003c/i\u003e 11, 2691-2710, \u003ca href=\"https://doi.org/10.5194/tc-11-2691-2017\"\u003edoi:10.5194/tc-11-2691-2017\u003c/a\u003e\u003cbr\u003e\n\n\u003cb\u003e*MSc thesis by Lynne Buie, where PyTrx was created in its earliest form*\u003c/b\u003e\u003cbr\u003e\nAddison (2015) PyTrx: feature tracking software for automated production of glacier velocity. MSc thesis, University of Edinburgh, UK, \u003ca href=\"https://hdl.handle.net/1842/11794\"\u003ehttps://hdl.handle.net/1842/11794\u003c/a\u003e\u003cbr\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eInstallation\u003c/h3\u003e\n\nThe PyTrx installation has been tested on Linux and Windows operating systems (it should also work on Apple operating systems too, it just hasn't been tested). PyTrx is primarily available through pip:\n\n```bash\npip install pytrx\n```\nBe warned that there are difficulties with the GDAL package on pip, meaning that gdal could not be declared explicitly as a PyTrx dependency in the pip package compiling. Please ensure that gdal is installed separately if installing PyTrx through pip. You should be able to create a new environment, install GDAL and the other dependencies with conda, and then install PyTrx with pip.\n\n```bash\nconda create --name pytrx3 python=3.7\nconda activate pytrx3\nconda install gdal opencv pillow scipy matplotlib spyder\npip install pytrx\n```\n\nBe aware that the PyTrx example scripts in this repository are not included with the pip distribution of PyTrx, given the size of the example dataset files. Either download these separately, or create a new conda environment (using the \u003ca href=\"https://github.com/PennyHow/PyTrx/blob/master/environment.yml\"\u003e.yml environment file\u003c/a\u003e provided) and clone the PyTrx GitHub repository:\n\n```bash\nconda env create --file environment.yml\nconda activate pytrx3\ngit clone https://github.com/PennyHow/PyTrx.git\n```\n\nSee our \u003ca href=\"https://pytrx.readthedocs.io/en/latest/Installation.html\"\u003ereadthedocs page on setting up PyTrx\u003c/a\u003e for more details.\n\n\u003chr\u003e\n\n\u003ch3\u003ePermissions and acknowledgements\u003c/h3\u003e\n\nPyTrx was initially developed and released as part of the  \u003ca href=\"https://www.researchinsvalbard.no/project/20000000-0000-0000-0000-000000007037/project-info\"\u003e CRIOS (Calving Rates and Impact on Sea Level\u003c/a\u003e project. PyTrx's continued development and maintenance is funded by an \u003ca href=\"https://eo4society.esa.int/projects/griml/\"\u003eESA Living Planet Fellowship\u003c/a\u003e.\u003cbr\u003e\n\nParts of the \u003cb\u003egeorectification functions\u003c/b\u003e in the PyTrx toolbox were inspired and translated from \u003ca href=\"http://imgraft.glaciology.net/\"\u003eImGRAFT\u003c/a\u003e, a photogrammetry toolbox for Matlab (\u003ca href=\"https://www.geosci-instrum-method-data-syst.net/4/23/2015/gi-4-23-2015.pdf\"\u003eMesserli and Grinsted, 2015\u003c/a\u003e). Where possible, ImGRAFT has been credited for in the corresponding PyTrx scripts (primarily some passages in the CamEnv.py script) and cited in relevant PyTrx publications. \u003cbr\u003e\n\nSee PyTrx's \u003ca href=\"https://pytrx.readthedocs.io/en/latest/Links.html\"\u003ereadthedocs\u003c/a\u003e for all permissions and acknowledgements.\n\n\u003chr\u003e\n \n\u003ch3\u003eLinks\u003c/h3\u003e\n\nThere are other useful software available for terrestrial photogrammetry in glaciology: \u003cbr\u003e\n\n\u003ca href=\"http://www.lancaster.ac.uk/staff/jamesm/software/pointcatcher.htm\"\u003ePointcatcher\u003c/a\u003e - Matlab-based GUI toolbox for feature-tracking and georectification \u003cbr\u003e\n\u003ca href=\"http://imgraft.glaciology.net/\"\u003eImGRAFT\u003c/a\u003e - Matlab toolbox for feature-tracking and georectification \u003cbr\u003e\n\u003ca href=\"https://tu-dresden.de/bu/umwelt/geo/ipf/photogrammetrie/forschung/forschungsprojekte/emt\"\u003eEMT (Environmental Motion Tracking)\u003c/a\u003e - GUI toolbox for feature-tracking and georectification \u003cbr\u003e\n\u003ca href=\"http://www.mn.uio.no/geo/english/research/projects/icemass/cias/\"\u003eCIAS\u003c/a\u003e - IDL gui for feature-tracking \u003cbr\u003e\n\u003ca href=\"https://www.geosci-model-dev.net/9/307/2016/\"\u003ePRACTISE\u003c/a\u003e - Matlab toolbox for georectification\n\n\u003chr\u003e\n\n\u003ch3\u003eCopyright\u003c/h3\u003e\n\nPyTrx is licensed under a \u003ca href=\"https://choosealicense.com/licenses/mit/\"\u003eMIT License\u003c/a\u003e.\n","funding_links":[],"readme_doi_urls":["https://dx.doi.org/10.3389/feart.2020.00021","https://dx.doi.org/10.1017/aog.2018.28","https://doi.org/10.5194/tc-11-2691-2017"],"works":{"https://dx.doi.org/10.3389/feart.2020.00021":{"id":"https://openalex.org/W3006136798","doi":"https://doi.org/10.3389/feart.2020.00021","title":"PyTrx: A Python-Based Monoscopic Terrestrial Photogrammetry Toolset for Glaciology","display_name":"PyTrx: A Python-Based Monoscopic Terrestrial Photogrammetry Toolset for Glaciology","publication_year":2020,"publication_date":"2020-02-13","ids":{"openalex":"https://openalex.org/W3006136798","doi":"https://doi.org/10.3389/feart.2020.00021","mag":"3006136798"},"language":"en","primary_location":{"is_oa":true,"landing_page_url":"https://doi.org/10.3389/feart.2020.00021","pdf_url":"https://www.frontiersin.org/articles/10.3389/feart.2020.00021/pdf","source":{"id":"https://openalex.org/S2595152256","display_name":"Frontiers in Earth Science","issn_l":"2296-6463","issn":["2296-6463"],"is_oa":true,"is_in_doaj":true,"host_organization":"https://openalex.org/P4310320527","host_organization_name":"Frontiers Media","host_organization_lineage":["https://openalex.org/P4310320527"],"host_organization_lineage_names":["Frontiers Media"],"type":"journal"},"license":"cc-by","version":"publishedVersion","is_accepted":true,"is_published":true},"type":"article","type_crossref":"journal-article","open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.frontiersin.org/articles/10.3389/feart.2020.00021/pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5015375576","display_name":"Penelope How","orcid":"https://orcid.org/0000-0002-8088-8497"},"institutions":[{"id":"https://openalex.org/I4210154540","display_name":"Asiaq Greenland Survey","ror":"https://ror.org/05pzd7w96","country_code":"GL","type":"government","lineage":["https://openalex.org/I4210154540"]},{"id":"https://openalex.org/I98677209","display_name":"University of Edinburgh","ror":"https://ror.org/01nrxwf90","country_code":"GB","type":"education","lineage":["https://openalex.org/I98677209"]}],"countries":["GB","GL"],"is_corresponding":true,"raw_author_name":"Penelope How","raw_affiliation_string":"Department of Arctic Geology, University Centre in Svalbard (UNIS), Longyearbyen, Norway; Department of Remote Sensing, Asiaq Greenland Survey, Nuuk, Greenland; Institute of Geography, School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom","raw_affiliation_strings":["Department of Arctic Geology, University Centre in Svalbard (UNIS), Longyearbyen, Norway","Department of Remote Sensing, Asiaq Greenland Survey, Nuuk, Greenland","Institute of Geography, School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom"]},{"author_position":"middle","author":{"id":"https://openalex.org/A5029744747","display_name":"Nick Hulton","orcid":null},"institutions":[{"id":"https://openalex.org/I98677209","display_name":"University of Edinburgh","ror":"https://ror.org/01nrxwf90","country_code":"GB","type":"education","lineage":["https://openalex.org/I98677209"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Nicholas R. 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