Category Archives: RS

实现了一个SCAR的zotero translator

Posted on 2009-05-27 by wlx

SCAR: Science of Cold and Arid Regions 是所里新办的一个期刊，看了几篇文章，打算摘录下来，zotero却不支持，需要自己再写一个转换器(translator)，花了一下午的时间，终于搞出来了，暂时不支持搜索功能。 把下面的代码保存到zotero下的translator目录，给个名字，如SCAR.js，然后重新启动一下FIREFOX，应该就可以使用了。 { “translatorID”:”d5770df3-b41a-45cb-bb3a-261948c9af49″, “translatorType”:4, “label”:”SCAR”, “creator”:”Liangxu Wang<wangliangxu＠gmail.com>”, “target”:”http://www.scar.ac.cn/hhkxen/ch/reader”, “minVersion”:”1.0″, “maxVersion”:”", “priority”:100, “inRepository”:true, “lastUpdated”:”2009-5-27 22:33:00″ } function detectWeb(doc, url) { var articleRe = /view_abstract.aspx/; var s = articleRe.exec(url); if(s) { return “journalArticle”; } … Continue reading →

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Leica Geosystems Acquires ER Mapper

Posted on 2007-05-22 by wlx

Stefano Costa writes ” Norcross, GA — Leica Geosystems Geospatial Imaging today announced that it has acquired all assets of Earth Resource Mapping Ltd (ER Mapper), a geospatial software company headquartered in Australia. ER Mapper is a world-class provider of … Continue reading →

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OSSIM简介

Posted on 2006-12-14 by wlx

什么是OSSIM？ 如果你在google里搜索ossim，会发现有两个相关产品： 一个是www.ossim.net，一个是www.ossim.org。 前面一个是Open Source Security Information Management的简写，后面一个是Open Source Software Image Map的简写。 我们这里介绍的是后者。 这里就把Mark Lucas写的overview简单翻译一下。

Posted in GIS, RS | Tagged , , , | 5 Comments

install envi 4.3 in ubuntu edgy

Posted on 2006-09-19 by wlx

First download envi 4.3 for linux into my home directory, then: cd tar -zxvf envi_linux.x86.tar.gz sudo mkdir /usr/local/rsi sudo mv idl_6.3 /usr/local/rsi sudo mv install /usr/local/rsi sudo mv license /usr/local/rsi cd /usr/local/rsi sudo ./install In the install process, I choose … Continue reading →

Posted in Linux, RS | Tagged , , | 6 Comments

How to figure out Principal Component Analysis band weightings

Posted on 2006-01-15 by wlx

在进行主成分分析时，如何计算原波段对主成分的贡献？ 答案在http://www.rsinc.com/services/techtip.asp?ttid=2807 在ENVI里转悠了半天，也没找到这个方法，google没有得到结果，最后是baidu到的。

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ubuntu breezy安装envi 4.2

Posted on 2005-11-24 by wlx

没有什么要注意的问题。 下载，解压缩到某安装目录，执行install，根据提示操作。 license文件拷贝到对应的idl_6.2目录下。 执行envi_4.2\bin目录下的envi文件，或者可以再作一个菜单项或桌面快捷方式，或加一个link到系统目录中。

Posted in Linux, RS | Tagged , , | 5 Comments

MODIS GRID Product

Posted on 2005-06-20 by wlx

Level 2G through level 4 products are considered gridded products. Gridded data are defined in a global non-overlapping grid. Globally, there are 460 tiles, of which 317 contain land pixels. Each tile has fixed Earth-locations covering an area of approximately … Continue reading →

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gdal.sh自动更新安装

Posted on 2004-11-24 by wlx

为了gdal更新的方便，写了一个简单的shell脚本： cd /root/gdal/ cvs update ./configure –with-hdf4 –with-netcdf –with-pg=/usr/local/pgsql/bin/pg_config –with-geos –with-libtiff=internal –with-static-proj4 –with-grass=/usr/local/grass-5.7.cvs make clean make make install

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EDS: EDD web发布端程序开发计划

Posted on 2004-11-15 by wlx

目前采用Linux+gdal+php进行处理. cvs -d :pserver:username@503.mygis.org:/edd checkout eds roadmap: version 1 实现基于文件的HDF文件浏览 元数据浏览 数据子集浏览 subdataset image view(include bands view) 基于文件名的搜索 基于HTTP的下载 数据整体空间浏览？ version 2 基于数据库（MySQL或Postgresql或通用数据库抽象接口） HDF数据入库 需要搜索的元数据入库 分页浏览、查询 thumb入库?(多波段如何处理?) 简单搜索（关键字） 高级搜索（基于坐标、关键字、时间…） 基于HTTP的下载 多种格式的下载（HDF、NETCDF、GEOTIFF、？） 会员制？ 基于FTP的会员制下载？ 数据整体空间浏览?(基于mapserver+postgis?)

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glovis 6.0的安装

Posted on 2004-11-14 by wlx

开始没想到,安装glovis居然很有难度. 仔细看了install.txt,也看了pdf文档,还是有很多不清楚. 感觉其做的文档不够详细(明白?).

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