NCSA HDFView

The HDFView is a Java-based tool for browsing and modifying NCSA HDF4 and HDF5 files. It enables the users to browse through any HDF4 and HDF5 file; starting with a tree view of all top-level objects in an HDF file's hierarchy. It allows a user to move down through the hierarchy and steer among the file's data objects. The content of a data object is loaded only when the object is selected, giving interactive and efficient access to HDF4 and HDF5 files. Its editing features permit a user to make, delete, and edit the value of HDF objects and attributes. The HDFView user interface is designed to be easy to use and intuitive. HDFView was implemented by using Java 2 Platform that is intended to be machine-independent. The interface and features of the HDFView are unified for all platforms. It shows the structure of the HDF file in a tree with data groups and data objects represented as conventional folders and icons. Users can easily enlarge or collapse folders to navigate the hierarchical structure of an HDF file.

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GDAL

GDAL [Geospatial Data Abstraction Library] is a translator library for geospatial raster data files distributed under X/MIT as a free software by the Open Source Geospatial Foundation. It utilizes single abstract data model for all formats. It has command line utilities for data processing and translation. It was originally developed by Frank Warmerdam until it was officially turned over to the Open Source Geospatial Foundation. The OGR library is also part of GDAL source tree. GDAL/OGR has become a freeware because of its extensive data exchange capabilities and due to its widespread comprehensive functions. It provides support for more than 120 geospatial raster formats.

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FWTools Suite

FWTools is a suite of free GIS binary kit for Linux and Windows. The kits are intended for easy installation by end users. FWTools includes GDAL, MapServer, OpenEV, OGDI and PROJ.4 with some supporting elements. FWTools also aims to keep track of the development versions of packages included in the program rather than the official release versions. This will allow the developer, FW, the means to create bug solutions for a wider audience than would be covered and provided from the source. FWTools also supports JPEG2000, ECW, HDF and other formats requiring extra libraries. FWTools for Linux are designed to be agnostic to packaging and distribution system, making it compatible with any Linux system released in the last few years. Its subpackages are MapServer [a device for Web mapping], PROJ.4 [cartographic projections library provided with command line utilities], GDAL/OGR [a set and library of reading and writing command utilities of geospatial vector (OGR) and raster (GDAL) formats], OpenEV [analysis tool and data viewer for raster/vector desktop], OGDI [multi-format vector and raster reading technology that supports military formats like RPF [CIB, CADRG], VPF [VITD, VMAP] and ADRG and Python scripting language.

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