Generating space-time composite images for GIS data

Simple item page
dc.contributor.authorHolness, Carolynen_ZA
dc.date.accessioned2014-12-30T19:45:31Z
dc.date.available2014-12-30T19:45:31Z
dc.date.issued2006en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractFor many decades scientists have been collecting marine data from survey boats that spend weeks at sea covering large areas and collecting data at regular points along the journey. With the introduction of remotely sensed satellite images, large amounts of environmental data (e.g. sea surface temperature) is now available to be used in studies on the effect of the ocean on phenomena observed on such journeys. Up until recently, mapping this environmental data from the satellite images has been done by averaging daily images for the duration of the survey to obtain a single image approximating the entire time span and the whole area covered in the survey. The problem with this however, is that in creating these temporal composite images, values are averaged out so that small variations that occur over short time scales are lost. In an effort to overcome this problem, the idea of a spatio-temporal composite image was proposed. This entails using pieces of daily images, where each piece represents the area covered by the survey on the same date, and merging these pieces to create a single image. This allows the original values from the satellite images to be retained which provides a much more realistice mapping of the environment. Satellite images and survey data can be viewed and analysed in a Geographical Information Systems (GIS), however creating these spatio-temporal composite images manually using the software is a time consuming and difficult task. This project investigates whether it is possible to develop an application to automatically create these images. On completion of the project it was found that not only was this possible, but that it also provided the means to create these images more accurately and far quicker than could be done manually and it was also easy to use even without prior GIS experience.en_ZA
dc.identifier.apacitationHolness, C. (2006). <i>Generating space-time composite images for GIS data</i>. (Thesis). University of Cape Town ,Faculty of Commerce ,Department of Information Systems. Retrieved from http://hdl.handle.net/11427/10608en_ZA
dc.identifier.chicagocitationHolness, Carolyn. <i>"Generating space-time composite images for GIS data."</i> Thesis., University of Cape Town ,Faculty of Commerce ,Department of Information Systems, 2006. http://hdl.handle.net/11427/10608en_ZA
dc.identifier.citationHolness, C. 2006. Generating space-time composite images for GIS data. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Holness, Carolyn AB - For many decades scientists have been collecting marine data from survey boats that spend weeks at sea covering large areas and collecting data at regular points along the journey. With the introduction of remotely sensed satellite images, large amounts of environmental data (e.g. sea surface temperature) is now available to be used in studies on the effect of the ocean on phenomena observed on such journeys. Up until recently, mapping this environmental data from the satellite images has been done by averaging daily images for the duration of the survey to obtain a single image approximating the entire time span and the whole area covered in the survey. The problem with this however, is that in creating these temporal composite images, values are averaged out so that small variations that occur over short time scales are lost. In an effort to overcome this problem, the idea of a spatio-temporal composite image was proposed. This entails using pieces of daily images, where each piece represents the area covered by the survey on the same date, and merging these pieces to create a single image. This allows the original values from the satellite images to be retained which provides a much more realistice mapping of the environment. Satellite images and survey data can be viewed and analysed in a Geographical Information Systems (GIS), however creating these spatio-temporal composite images manually using the software is a time consuming and difficult task. This project investigates whether it is possible to develop an application to automatically create these images. On completion of the project it was found that not only was this possible, but that it also provided the means to create these images more accurately and far quicker than could be done manually and it was also easy to use even without prior GIS experience. DA - 2006 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - Generating space-time composite images for GIS data TI - Generating space-time composite images for GIS data UR - http://hdl.handle.net/11427/10608 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/10608
dc.identifier.vancouvercitationHolness C. Generating space-time composite images for GIS data. [Thesis]. University of Cape Town ,Faculty of Commerce ,Department of Information Systems, 2006 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/10608en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Information Systemsen_ZA
dc.publisher.facultyFaculty of Commerceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherInformation Technologyen_ZA
dc.titleGenerating space-time composite images for GIS dataen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_com_2006_holness_c.pdf
Size:
11.53 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters