Blowing it up improves the accuracy of selecting a specific pixel, but if the overall accuracy of the DOQQ is off, then the position you measure will be off, too. Having said that, I’ve measured multiple points in this area using both a Trimble XM with post-processing, and a regular...
historical GiSThe measurement and management of positional accuracy and positional uncertainty is especially problematic in historical cartography and Historical GIS applications, for at least two reasons: first, historical sources, and especially historical maps, generally carry a higher degree of positional...
Positional Accuracy of Spatial Data: Non‐Normal Distributions and a Critique of the National Standard for Spatial Data Accuracy Spatial data quality is a paramount concern in all GIS applications. Existing spatial data accuracy standards, including the National Standard for Spatial ... PA Zandbergen ...
Nonetheless, the results also show that georegistration and large horizontal errors occur in GE's imagery. Consequently, despite its overall horizontal positional accuracy, coordinates extracted from GE's imagery should be used with caution. 展开 ...
This makes it possible to identify the level of simplification that eliminates the largest number of vertices while still attaining a specific positional accuracy standard. A simple implementation strategy is described in which an optimal level of simplification is identified and simplification is applied...
Modelling Positional Uncertainty of Line Primitives in GIS In this paper, the positional uncertainty models of point and lineprimitives in GIS are made. On the basis of this, a set of accuracy indicators forpoint a... D Li,M Peng,J Zhang - 《Journal of Wuhan Technical University of Surveyi...
Also, the solution's parameters relating accuracy and efficiencymay be adjusted to maximize the gain in one while relaxing the other accordingto user's demand. 展开 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 Semantic Scholar (全网免费下载) lbd.dcc.ufmg.br lbd.dcc.ufmg.br (...
Also, we introduce a post-extraction method for improving the object extraction accuracy.; In addition to linear objects, in this thesis we extend differential snakes to track deformations of areal objects (e.g., lake flooding, oil spills). From the polygonal description of a spatial object we...
With the exploration of gas hydrate in China going forward to the phase when field test drilling is carried out,the accuracy of navigation and positioning has to be improved to identify gas hydrate more accurately and describe its outer conformation and distribution characteristics more precisely so ...
(GIS)problems.ItcanalsodealwithalargeamountofdatainGIS.Therefore,theanalyticalmodelpresented,whichprovidesamorecomprehensiveshapemeasureforassessingpositionalerrorindataderivedfromthegeneralization,isvaluableinthedevelopmentofautomaticgeneralization.r2005ElsevierLtd.Allrightsreserved.Keywords:GIS;Automaticgeneralization;...