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Automated approaches for displaying spatially oriented time‐series data through image processing techniques
Journal article   Peer reviewed

Automated approaches for displaying spatially oriented time‐series data through image processing techniques

Ian E Von Essen and Stephen J Walsh
Geocarto International, Vol.4(4), pp.27-37
1989
DOI: https://doi.org/10.1080/10106048909354232
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https://doi.org/10.1080/10106048909354232View
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Abstract

Geomatic Engineering
This study demonstrated the cartographic implications of automated image processing and computer graphics for the study of time-series data. Automated statistical and image processing techniques were applied to a case study data set consisting of weekly Crop Moisture Index (CMI) values summarized at 174 state cooperative weather stations within Oklahoma for the time period between February and October, 1980. Computer generated isoline maps of the CMI values were interpolated and rescaled into a series of 32 grid matrices for input into a raster-based ERDAS image processing software system. Principal Components Analysis (PCA) was used to develop graphic models that synthesized the multi-temporal data into statistical dimensions that represented the most significant elements of CMI variability. Graphic models of the PCA statistical vectors were displayed individually, in conjunction with eigenvector loadings, and as composite images. Resultant images were analyzed statistically and graphically through the generated CMI grid matrices to ascertain the location, severity, and progression of drought represented in the CMI values. Traditional image processing techniques and devices were combined with the ERDAS software system to transform the multi-temporal CMI data into multi-dimensional images that represented the drought's spatial and temporal signature unobscured by redundant information.

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