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Domain: remotesensing.org

Stories and comments across the archive that link to remotesensing.org.

Comments · 6

  1. Re:PDFs... by vbraga · · Score: 1 · on Multi-page PDF To Multi-page TIFF and Archiving?

    There's already a extension for bigger TIFF files and a version of libtiff to support it.

  2. Some OSS solutions for big rasters by xixax · · Score: 1 · on Google Adds Satellite Imagery to Maps
    Anybody have any software that would take a large image file and apply a google-map-like interface to it?

    We use Mapserver using the GDAL/OGR and GeoTIFF libraries (and ECW wavelet images when I get some time). Using GeoTIFF alone (which provides image indexing and pyramiding), I have 10,000 x 15,000 pixel, 4 Gb images that render in a fraction of a second. Mapserver includes tools for image tiling as you describe, but we only bothered with that when we hit filesystem file size limits for individual images. ECW will giv us much smller file sizes, and the EPPL7 format supported in GDAL apparently has some good performance features.

    Xix.
  3. Re:fast notebook? by MoonChildCY · · Score: 1 · on Super Maps for the 21st Century
    You know... you could have used PROJ to do it, and get it done really fast.

    There are some people out there that dedicated their time to create programs that can do pretty much any transformation imaginable, in a very efficient way.

    And correct me if I am wrong, but the transformation you refer to is to the datum, not to the projection, isn't it? Datum and projections are enirely different things, therefore they need entirely different transformation algorithms. And yes, datum transformations tend to be tedious, but still doable in yesterday's hardware.

  4. Re:As usual, partially old news. by maphew · · Score: 2 · on Development of OS Satellite Image Processing/Mapping

    Maybe old news for you, but this is the first I've heard of IPW (thanks for the link) and I try to keep an eye on these things. RS.org also hosts LIMP - Large Image Manipulation Project - which is not to be confused with LIMP - the Linux Montage Project. GRASS has already been mentioned, and there is also SPRING, TOPOG (almost but not quite Free Software) and OpenMap.

    Another good place in addition to remotesensing.org to keep an eye on Libre RS/GIS software development and data is freegis.org.

  5. Absolute Rubbish by nstrug · · Score: 1 · on Implications of Commercial 1m Res Satellite
    I work every day with satellite data from 10m to 1km and aerial data down to 15cm. At work I have a perfectly ordinary SGI O2 running Erdas Imagine. At home I have a perfectly ordinary home-build AMD K6-2 running ENVI (under linux of course...) I run the full gamut of image processing techniques - all on bog standard hardware.

    There is plenty of free image processing software out there - if you're old school try GRASS, if you want to get involved in the development of a more modern system try LIMP.

    Nick

  6. Conspiracy - Not! by Anonymous Coward · · Score: 1 · on Ikonos 1 lost in space
    OK folks, take it easy on the conspiracy theories. The US government already has lots of control over satellite imagery collected by US companies, so they don't need to take a satellite out of operation to prevent imaging of stuff they don't want seen. However, the US government doesn't control data distributed by non-US groups such as Spot Image in France, and the loads of old Russian spy imagery being sold cheap. That is a bit of a concern for them.

    The government also has lots of better spy satellites, and has for well over a decade.

    This is just another unfortunate screwup in the satellite industry. Nothing earth shattering, but unfortunate for the remote sensing industry as a whole which needs more, better and cheaper data.

    Ikonos 2 is apparently already built, and should be launched relatively soon.

    Folks might want to learn more about remote sensing at the OSRS Watercooler which was launched with the mission of being a SlashDot for the Remote Sensing and GIS community.