Two New Metrics for Evaluating Pixel-Based Change in Data Sets of Global Extent due to Projection Transformation
Bibliographic Data
| ID | 14701439 |
|---|---|
| Authors | Karen Mulcahy (East Carolina University, corresponding author) |
| Year | 2000 |
| Volume | 37 |
| Issue | 2 |
| Pages | 1-12 |
| Publication date | 2000-06-01 |
| Open Access | No |
| Type | ARTICLE |
| Venue | Cartographica The International Journal for Geographic Information and Geovisualization (JOURNAL) |
| Journal identifiers | ISSN: 0317-7173 • E-ISSN: 1911-9925 |
| Publisher | University of Toronto Press Inc. (UTPress) (PUBLISHER) |
| DOI | 10.3138/c157-258r-2202-5835 |
| OpenAlex | W1993590196 |
| Language | EN |
| Citations received | 4 |
New metrics are introduced for tracking pixel loss and duplication during the transformation of discrete raster data sets by map projection. The metrics, PL and PD, successfully measure pixel loss and pixel duplication, respectively, throughout the spatial realm and provide evidence of the property of equal area. PL and PD are applied to the examination of world equal-area map projections. Traditional map projection distortion evaluation addresses scale, area, shape, and directional distortion, which is appropriate to point-by-point analytical projection methods used for vector data. PL and PD provide an additional means for evaluating map projection distortion for discrete raster data. Data producers and data users, including researchers and policy makers, are often unaware that the choice of a map projection may affect the content of data sets and, possibly, research results. Pixel duplication may be reversed in some cases, but lost pixels mean that data has been lost forever. The results of this work indicate the need for a change in cartographic recommendations for selecting global raster data map projections. The Sinusoid projection, with the greatest angular distortion of the projections studied, would be an unlikely choice for a global equal-area data set, but it exhibits no pixel loss or duplication
Algorithm · Computer vision · Data mining · Distortion (music · Map projection · Pixel · Projection (relational algebra · Raster graphics · Telecommunications · Transformation (genetics · Computer Science · Geophysics and Gravity Measurements · GNSS positioning and interference · Historical Geography and Cartography · Mathematics · Artificial Intelligence
| Citations per year | 0.17 |
|---|---|
| Citation span | 2003 - 2020 (18) |
| Highly cited | No |