论地图符号中的地图美学     

刘川蔡畅  张景辉 《解放军测绘研究所学报》2007,27(4):25-28

地图产品是科学和艺术的结合体，地图符号又是表现地图艺术的重要载体，本文介绍了地图美学在地图信息传输巾的重要性和地图符号构成的地图美学要素，从地冈符号的形状、尺寸和色彩方面探讨地图美学应用的问题，提出了关丁符号设计方面的几点看法。  相似文献   

Description and evaluation of the high quality photogrammetric scanner UltraScan 5000     

Michael Gruber  Franz Leberl 《ISPRS Journal of Photogrammetry and Remote Sensing》2001,55(5-6)

Scanning of analogue images has become a key hardware technology specific to modern digital photogrammetry. Since specialised photogrammetric scanners have been introduced in the late 1980s, a gradual development and improvement of their performance regarding hardware, software and functionality, and productivity has been observed. Originally, geometric accuracy of scanners was the overriding specification for scanners. This is increasingly being augmented by a concern for good colour and radiometric performance. This article describes the UltraScan 5000, a modern photogrammetric scanner manufactured by Vexcel Imaging Austria, and its features, assesses its radiometric and geometric performance with various well-founded tests, and discusses its versatility and use in production. The UltraScan 5000 was introduced in November 1998 and since then, a surprisingly large number of systems has been installed worldwide. Their successful operation illustrates on a daily basis the validity of the technical solution and tests at user sites have confirmed a good to excellent performance regarding geometric accuracy and resolution, radiometric performance (noise, dynamic range) and colour rendition.  相似文献   

Digital sediment colour analyses, DSCA, of lake sediments - pitfalls and potentials     

Jakob Christensen  Svante Björck 《Journal of Paleolimnology》2001,25(4):531-538

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计算矿物颜色指数的新检索表   总被引：4，自引：2，他引：4  

刘建明 《矿物学报》1993,13(4):391-401

本文为国际上通用的两种标准光源－Ａ的Ｃ以及等能光源提供一套求解颜色主波长λｄ和饱和度Ｐｅ的新检索表。使读者能完全脱离色品图直接表解出λｄ和Ｐｅ。本法简单快速、准确可靠。此外还给出了使用等值纵坐标法计算矿物颜色相对于上述光源的三刺激值（Ｘ、Ｙ、Ｚ）所需的基本数据。  相似文献   

Thermal maturation of the Lower Palaeozoic strata in the southwestern margin of the Malopolska Massif,southern Poland: no evidence for Caledonian regional metamorphism     

Z. Belka  A. Siewniak-Madej 《International Journal of Earth Sciences》1996,85(4):775-781

Conodont colour alteration index (CAI) values have been used for the assessment of the thermal history of Lower Palaeozoic strata in the southwestern margin of the Malopolska Massif, along the contact with the Upper Silesian Massif. The CAI data provide no evidence for a previously suggested greenschistgrade regional metamorphism in the Cracow-Myszkow zone during the Caledonian epoch. Near Zarki, the Silurian rocks display a relatively uniform thermal overprint (CAI values of 4) resulting from sedimentary burial during the early Late Carboniferous. The estimated maximum temperatures of 200–220°C can be explained by an elevated heat flow associated with the Cracow Fault system. This thermal maturation level was locally enhanced (CAI values up to 8) after the Westphalian, due to the magmatic activity caused by the Variscan regional extension.  相似文献   

遥感信息场分层解析与构造应力场定量研究   总被引：11，自引：1，他引：11       下载免费PDF全文

杨武年 《地质学报》1997,71(1):86-96,T001

遥感图像显现的地质构造形迹是地史以来地壳运动的最终结果,包含有历次构造变形的特征信息。因此,构造复合区不同期次构造应力场的图像解析,可将宏观构造(褶皱和断裂)和与其密切相关的微观构造(遥感大节理)有机联系起来进行构造变形组合的分解,即分不同构造层次(期次)建立其变形场,然后通过构造变形场特征的综合分析研究反演各时期应力场。环形构造及相关的环状、放射状遥感大节理与地下隐伏构造隆起在空间上有一定对应关系。本文根据弹性力学理论,提出了在遥感构造信息场分层解析基础上将有关构造信息有机组合量化,建立隐伏构造隆起的自然模型,以此数据定量计算构造应力场的理论与方法,并给出了应用实例。  相似文献   

贵州省1：50万地球化学图编图方法   总被引：1，自引：0，他引：1  

杨永贵 《物探化探计算技术》1997,19(4):370-373

本文是一份编图方法的总结。文中简要介绍了使用计算机编图的方法和技术，它包括从数据入库、参数统计、数据系统偏倚的屏幕动态调整、色区值的选用、色块图的动态显示到图形的绘制等都使用计算机处理。此项技术投入资金少，但经济效益和成图质量好，故具有一定的实用价值。  相似文献   

La Réponse aux Couleurs chez Dicentrarchus labrax (Moronidae), Placé en Situation de «Self-feeding>>, et de Choix Multiple: Response to Colours in Dicentrarchus labrax (Moronidae), in a Self-Feeding and Multiple Choice Condition     

M. Kentouri    M. Anthouard  P. Divanach 《Marine Ecology》1993,14(3):259-274

Abstract. A population of sea-bass, housed under semi-natural and self-feeding conditions, was presented with six different coloured levers. Their choices tended to favour more colour-contrasted levers and were greatly affected by environmental conditions such as stress factors, circadian period, season, and thermal fluctuations. A correlation was observed between increases in instrumental acitivity, indicating an increase in energetic requirements, and a widening of choices in the exploitation of the coloured levers.
Consequences of these behaviours were considered in relation to predator pressure that the fish imposes on potential prey populations in the natural environment, and in relation to the initiation of feeding activity when the fish are maintained in captivity and under self-feeding conditions.  相似文献   

卫星海洋水色遥感的辐射模式研究   总被引：6，自引：3，他引：6  

潘德炉  李淑菁  毛天明 《海洋与湖沼》1997,28(6):652-658

海洋水体向上的辐射由水中多种成分的浓度所决定，同时辐射的强度十分微弱并随着时间和空间在变化。因此，海洋水色遥感需要从水体和大气辐射传递机理出发，研究到达卫星遥感器的辐射模式，以达到模拟仿真卫星水色遥感图像和卫星图像质量预测的目的。本研究通过叶绿素、悬浮泥沙和黄色物质等海洋水色的主要因子，分别从可见光波段和荧光波段对辐射的贡献出发，发展了海洋水体离水辐射率模式。在卫星水色遥感机理的基础上，同时运用Iqbal，Gordon和Sturm等的大气程辐射模式和太阳耀光模式，使卫星海洋水色遥感的辐射模式系统化，模拟仿真了我国1990年9月3日发射的FYIB卫星两个海洋水色通道的全轨道辐射图像，同时利用从德国柏林大学气象中心接收到的1990年9月23－25日卫星图像进行验证。结果认为，本文所发展的模式可应用于卫星图像质量的预测和水色信息的提取。  相似文献   

Using a digital camera for water quality measurements in Galway Bay   总被引：2，自引：0，他引：2  

L.M. Goddijn  M. White 《Estuarine, Coastal and Shelf Science》2006,66(3-4):429-436

A method for using the red–green–blue (RGB) digital output from a digital camera, a Nikon Coolpix 885, to estimate water quality parameters is described. To eliminate reflection from the water surface, a tube is fitted around the camera lens which breaks the surface such that only the upwelling light from below is measured. To obtain consistency between stations, RGB values used for analysis are taken where the total cameras response (R + G + B) is a constant value, derived from pictures taken at a range of exposures.The method has been successfully used in Galway Bay, where the optical characteristics of the coastal water are dominated by yellow substance (or coloured dissolved organic material – CDOM) and chlorophyll. A strong linear relationship was found between CDOM and the Red/Blue camera output. The form of the relationship was consistent with previous measurements using more conventional narrow band irradiance sensors. In addition, a log–log relationship between chlorophyll and the Green/Blue camera output was also found. Some problems exist with the use of the camera, particularly with the cameras automatic functions such as ‘white balance’ which may artificially change the RGB output. Nevertheless, the use of a camera for simple water quality measurements has been demonstrated.  相似文献