| 1. | In the raster data model , the map s accuracy also depends on the map s scale
在栅格数据模型中，地图的准确性还依赖于地图的比例。 |
| 2. | There are two kinds of data form for map data , one is in the raster form , the other is the vector one
地图数据的存储形式一般有两种：栅格数据和矢量数据。 |
| 3. | The library gives programmers a common data model covering all raster data formats and - through ogr - vector data formats
该库为编程人员提供了通用的数据模型，包括所有栅格数据格式和矢量数据格式（通过ogr ） 。 |
| 4. | However , storage might not be quite as important for raster data , whose spatial component likely contains fairly simple numerical data
然而，存储可能不像栅格数据那样重要，其空间构成可能包含相当简单的数字数据。 |
| 5. | Programmers must take only a few higher - level constructs into account , although most programmers regard raster data as cumbersome and memory - intensive
编程人员只须知道一些较高级别的结构，但是多数编程人员认为栅格数据较为复杂并且占用大量的存储。 |
| 6. | Qgis handles all three - raster , vector , and database - a state of affairs that took considerable effort for programmers writing gis data programming libraries
Qgis处理所有三种数据栅格数据、矢量数据和数据库，这也是编写gis数据编程库的程序员的重要努力方向。 |
| 7. | Vector data require far less storage than raster data because arc node lists simplify and reduce the data required to make sense of the features contained in the map
矢量数据要求的存储要比栅格数据少得多，因为弧节点列表简化并减少了表示地图中包含的特征所需的数据。 |
| 8. | The paper proposes an algorithm with high performance for raster data dynamic scheduling . experiment shows that the algorithm is very efficient in applications of three - dimension terrain visualization
摘要提出了一个通过数据缓冲区和多线程调度的算法，实现了大范围栅格数据的实时动态调度，提高了地形数据三维可视化表达的效率，在实践应用中取得了很好的效果。 |
| 9. | ( 3 ) the function of spatial analysis of gis is made full use of . the fundamental methods and work process with the analysis function of spatial overlap of raster data to have a hazard assessment of landslide are found out
( 3 )在研究中充分利用了地理信息系统的空间分析功能，摸索出了利用栅格数据的空间叠加分析功能，进行滑坡危险性评价的基本方法和工作流程。 |
| 10. | Then the distributed computing strategies of spatial information is discussed as a whole , the strategy together with the spatial object , spatial relationship , raster data is designed , realizes the distributed computing strategies and algorithm
在此基础上，对空间信息在网络环境下的分布式计算策略进行了统一研究，并分别对空间对象，空间关系，栅格数据设计，实现了相应的分布式计算方案与运算算法。 |
