base map

基本解释

A value-base map may provide some useful description, but the principle-centered compass provides invaluable vision and direction.
有价值的地图可提供有用的信息，但是严谨的罗盘却为我们提供非常重要的指南和方向。
With your selected pixel coordinates and a single-layer base reflectivity map, the logical process for detecting precipitation near a spot on the map is straightforward.
使用选定的像素坐标和单层基本反射率图，检测地图中某个场所附近的降水的逻辑过程将十分简单。
[ZHANGZheng-fu. Study on the method of updating county-level land use base-map using remote sensing technology[J]. Remote Sensing Technologyand Application, 2002,17(6):381~384. ].
[16]张正福。应用遥感技术辅助更新县级土地利用基础图件的方法研究[J]。遥感技术与应用，2002，17（6）：381~384。

The iQue M5 shows major highways, thoroughfares, railways, lakes, rivers and borders within its built-in base map of North and South America and Puerto Rico.
MSN: Supercharged PDA with GPS really flies
The genome project, which the government began in 1987, aimed to speed the gene-hunting effort by providing the first full map of all 3 billion base pairs that make up human DNA. (It was not necessary, in this effort, to run through all the pairs on each set of chromosomes, or 6 billion pairs.) And because the base pairs come in only four varieties, they are digital and ideal for computer decoding.
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