Thursday, November 18, 2010

Free Geographic/UTM Coordinate Converter and Datum Transformations

Geographic/UTM Coordinate Converter is a online tools for coordinates convertions. You can convert between geographic coordinates and Universal Transverse Mercator (UTM) coordinates using  form that available on this site. With Coordinate and Datum Transformations you can convert coordinates between a variety of geodetic datums

ENVI - Remote Sensing and GIS software

ENVI - Remote Sensing and GIS software. ENVI is a software for processing and analyzing geospatial imagery used by scientists, researchers, image analysts, and GIS professionals around the world. ENVI software combines the latest spectral image processing and image analysis technology with an intuitive, user-friendly interface to help you get meaningful information from imagery.

ILWIS - Remote Sensing and GIS software

Open source Remote Sensing and GIS software. The Integrated Land and Water Information System (ILWIS) is a PC-based GIS & Remote Sensing software, developed by ITC up to release 3.3 in 2005. ILWIS comprises a complete package of image processing, spatial analysis and digital mapping. It is easy to learn and use; it has full on-line help, extensive tutorials for direct use in courses and 25 case studies of various discipline

ILWIS software is freely available ('as-is' and free of charge) as open source software (binaries and source code) under the 52°North initiative (GPL license). This software version is called ILWIS 3.4 Open.

More detail about ILWIS (For download and free tutorials and documentation) , click here ILWIS - Remote Sensing and GIS software

Open Source GIS Application Directory is a website that lists applications related to gis, the application contained on the site most with free licences (GNU/Public) and open source so that we can study the script and develop the application gis.

For more detail , visite here Open Source GIS

GARNIX a scriptable coordinate conversion tool

GARNIX is a communication program that provides data interface between MS-DOS/Windows/Linux/OSX computers and a GARMIN GPS device .
GARNIX also open source appplication with scriptable coordinate conversion tool  that can converts lon/lat, ECEF und TM (Gauss-Kr├╝ger) coordinate systems , and GARNIX works with a variety of GARMIN GPS receivers.

Licences is Free (GNU licence)

Download here coordinate conversion tool

Free download Landsat images for entire world

LANDSAT-1 was the world's first earth observation satellite (EOS), launched by the United States in 1972. It is recognized for its ability to observe the earth far from space. Its excellent set of capabilities emphasized the importance of state-of-the-art remote sensing. Following LANDSAT-1, LANDSAT-2, 3, 4, 5, and 7 were launched. LANDSAT-7 is currently operated as a primary satellite.

LANDSAT-5 was equipped with a multispectral scanner (MSS) and thematic mapper (TM). MSS is an optical sensor designed to observe solar radiation, which is reflected from the Earth's surface in four different spectral bands, using a combination of the optical system and the sensor. TM is a more advanced version of the observation equipment used in the MSS, which observes the Earth's surface in seven spectral bands that range from visible to thermal infrared regions.

The LANDSAT-7 satellite was successfully launched from Vandenburg Air Force Base on April 15, 1999. LANDSAT-7 is a 5,000 pound-class satellite, designed for a 705 km, sun-synchronous, earth mapping orbit with a 16-day repeat cycle. The payload is a single nadir-pointing instrument, the Enhanced Thematic Mapper Plus (ETM+). S-Band is used for commanding and housekeeping telemetry operations, while X-Band is used for instrument data downlink. A 378 gigabit solid state recorder (SSR) can hold 42 minutes of instrument data and 29 hours of housekeeping telemetry concurrently.

LANDSAT-7 is equipped with Enhanced Thematic Mapper Plus (ETM+), the successor of TM. The observation bands are essentially the same seven bands as TM, and the newly added panchromatic band 8, with a high resolution of 15m was added. An instrument malfunction occurred on May 31, 2003, with the result that all Landsat 7 scenes acquired since July 14, 2003 have been collected in "SLC-off" mode

Free download Landsat images for entire world is available for download in MrSID image format. For direct download click here download Landsat images

Free download SRTM Data for entire world

The CGIAR-CSI GeoPortal is able to provide SRTM 90m Digital Elevation Data for the entire world. The SRTM digital elevation data, produced by NASA originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world. The SRTM digital elevation data provided on this site has been processed to fill data voids, and to facilitate it's ease of use by a wide group of potential users. This data is provided in an effort to promote the use of geospatial science and applications for sustainable development and resource conservation in the developing world. Digital elevation models (DEM) for the entire globe, covering all of the countries of the world, are available for download on this site.

The SRTM 90m DEM's have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. All are produced from a seamless dataset to allow easy mosaicing. These are available in both ArcInfo ASCII and GeoTiff format to facilitate their ease of use in a variety of image processing and GIS applications. Data can be downloaded using a browser or accessed directly from the ftp site

For direct download please click here download SRTM Data

User can input co-ordinates of their choice, in different modes (Decimal Input, Deg/Min/Sec). Minimum and Maximum extremes have to be specified for both longitude and latitude.

Technical Documents IKONOS , QuickBird, and SPOT-5

Technical Documents IKONOS , QuickBird, and SPOT-5. The following Technical Documents resources about High Resolution Satellite Sensors includes  IKONOS , QuickBird, and SPOT-5


    * IKONOS Geometry Accuracy - J. Grodecki and G. Dial — PDF (163 KB)
    * IKONOS Geometric Accuracy Validation - J. Grodecki and G. Dial — PDF (374 KB)


    * QuickBird Imagery Product Frequently Asked Questions (FAQ) — PDF (188 KB)


Type of ALOS sensors ( Panchromatic sensor, Multispectral sensors, Radar sensors)

ALOS has three sensors on the satellite that consists of panchromatic sensor, Multispectral sensors and Radar sensors with details as below: :

1. Panchromatic sensor, named PRISM. It's like aerial photography, resolution 2.5

2. Multispectral sensors, called AVNIR-2. It's like ASTER or Landsat.
AVNIR-2 consists of 4 bands VNIR, 10 m spatial resolution

3. Radar sensors, called PALSAR. It's like RADARSAT or TerraSAR-X but
with a lower resolution, 10 m up to several tens of meters depending on the mode retrieval of data.

Tuesday, August 17, 2010

Wednesday, June 2, 2010

Free sig tutorials

Include GIS, and Remote sensing articles, tips and tutorials