A new grid-cell-based method for error evaluation of vector-to-raster conversion
文献类型：期刊论文
| 作者 | Liao Shunbao ; Bai Yan(白燕) |
| 刊名 | COMPUTATIONAL GEOSCIENCES
 |
| 出版日期 | 2010 |
| 卷号 | 14期号:4页码:539-549 |
| 关键词 | Rasterization Error evaluation Grid cell |
| 通讯作者 | Liao Shunbao |
| 英文摘要 | Error evaluation of rasterization of vector data is one of the most important research topics in the field of geographical information systems. Current methods for evaluating rasterization errors are far from perfect and need further improvement. The objective of this study is to introduce a new error evaluation method that is based on grid cells (EEM-BGC). The EEM-BGC follows four steps. First, the area of each land category inside a square is represented in a vector format. The size and location of the square are exactly the same as those of a grid cell that is to be generated by rasterization. Second, the area is treated as the attribute of the grid cell. Vector data are rasterized into n grids, where n is the number of land categories. Then, the relative area error resulting from rasterization for each land category in the grid cell is calculated in raster format. Lastly, the average of the relative area error for all land categories in the grid cell is computed with the area of a land category as weight. As a case study, the EEM-BGC is applied for evaluating the rasterization error of the land cover data of Beijing at a scale of 1 to 250,000. It is found that the error derived from a conventional method (denoted as y) is significantly underestimated in comparison with that derived from the new method (denoted as x), with y = 0.0014x (2.6667). The EEM-BGC is effective in capturing not only the spatial distribution of rasterization errors at the grid-cell level but also the numerical distribution range of the errors. The EEM-BGC is more objective and accurate than any conventional method that is used for evaluating rasterization errors. |
| 收录类别 | SCI |
| 资助信息 | State Key Laboratory of the Resources and Environment Information System O88RA100SA;Institute of Geographic Sciences and Natural Resources Research of the Chinese Academy of Sciences O66U0309SZ |
| 语种 | 英语 |
| 公开日期 | 2011-10-22 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/6169]  |
| 专题 | 地理科学与资源研究所_研究生部 |
| 推荐引用方式 GB/T 7714 | Liao Shunbao,Bai Yan. A new grid-cell-based method for error evaluation of vector-to-raster conversion[J]. COMPUTATIONAL GEOSCIENCES,2010,14(4):539-549. |
| APA | Liao Shunbao,&Bai Yan.(2010).A new grid-cell-based method for error evaluation of vector-to-raster conversion.COMPUTATIONAL GEOSCIENCES,14(4),539-549. |
| MLA | Liao Shunbao,et al."A new grid-cell-based method for error evaluation of vector-to-raster conversion".COMPUTATIONAL GEOSCIENCES 14.4(2010):539-549. |
入库方式： OAI收割
来源：地理科学与资源研究所
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