(1. 中南大學(xué) 有色金屬成礦預(yù)測教育部重點實驗室，長沙 410083；
2. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長沙 410083；2. 長沙五維地科勘察技術(shù)有限責(zé)任公司，長沙 410205)
摘 要: 針對矩形網(wǎng)格化方法和傳統(tǒng)三角網(wǎng)格化方法的不足，提出一種三角網(wǎng)逆生長網(wǎng)格化方法。該方法首先根據(jù)離散物探數(shù)據(jù)的特點提取數(shù)據(jù)邊界，然后以邊界作為基礎(chǔ)由外向內(nèi)逆向生長構(gòu)建三角網(wǎng)。應(yīng)用某測區(qū)的EH4電磁測深數(shù)據(jù)進(jìn)行網(wǎng)格化及可視化分析。實驗結(jié)果表明：該方法能夠在當(dāng)前數(shù)據(jù)條件下智能地生成高質(zhì)量的不規(guī)則三角網(wǎng)，且邊界擬合算法簡單精確，可以為后續(xù)的數(shù)據(jù)可視化和資料處理解釋提供良好的基礎(chǔ)。
關(guān)鍵字: 物探數(shù)據(jù)；網(wǎng)格化；三角網(wǎng)；生長算法
creating triangular mesh of geophysical data
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Central South University, Changsha 410083, China;
2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
3. Changsha 5D Geo-survey & Technical Co., Ltd., Changsha 410205, China）
Abstract:To solve those problems existed in rectangular grid and triangular mesh method, an inverse growth algorithm for the geophysical data was presented. According to the characteristics of discrete geophysical data, the data boundary was extracted first, and then triangular mesh was generated from outside to inside by using the boundary as the basis. This algorithm was used to triangulation and visualization analysis of an EH4 sounding profile data. The result states that, high-quality irregular triangular mesh can be generated automatically, and the data boundary is fitted easily and accurately, a good foundation is provided for data visualization and data processing.
Key words: geophysical data; gridding; triangular mesh; growth algorithm
