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Frequently Asked Questions

What does accuracy mean in GIS and remote sensing?

Land Cover Analysis - Technical FAQs
Spatial Accuracy is the measure of how well features in a geographically registered layer correspond to their positions on the Earth's surface. This is usually measured by a Root Mean Squared Error (RMSE). For C-CAP applications, an RMSE of one pixel is expected, but often smaller errors are reached. It is possible to reach spatial accuracies of less than one-pixel width RMSE under certain conditions (flat terrain and properly modeled sensor distortion).
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What does the University of Michigan offer in terms of GIS and Remote Sensing education?

ESALab FAQs
Please visit the ESA Lab's education page for more information on: GIS/RS courses offered through the School of Natural Resources and Environment (SNRE) and the University of Michigan; workshops offered through the ESA Lab, CSCAR and NSDS; and the graduate certificate program in Spatial Analysis.
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What does 'recent accuracy' mean?

Defensio · FAQ - Frequently Asked Questions
Recent accuracy is a measure of how well Defensio has been performing on your blog lately. It is computed by subtracting out the errors (false postives and false negatives) over the last 7 days of comment activity on your blog, and dividing this by the total comment traffic over that period. The closer Defensio is to 100%, the better we're doing! Not really. We highly recommend that you use Defensio as your stand alone spam filtering solution.
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HOW DOES REMOTE SENSING WORK?

TEC Imagery Office - FAQs
Remote sensing satellites collect image data either actively or passively. Radar satellites collect data actively by sending a known signal from the satellite to the earth and measuring the portion of the signal that is returned. A passive device measures the incoming energy, either started at the sun and reflected by the object, or started at the object as a result of its temperature.
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I am new to remote sensing and GIS. What can I use this data for?

GLCF: FAQ
The data provided by GLCF can prove useful in global, regional and even local analyses of the earth's surface. Many of our derived products, such as our 1km global land cover product can be particularly useful when combined with higher resolution data types such as Landsat TM, ETM+ and MSS. What is the recommended browser and platform for using your web site? Given the qualification that many of our users customize their browsers, are behind stringent firewalls, etc.
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What is the future of Remote Sensing and GIS and how useful the courses at IIRS would be?

General FAQ
Remote Sensing, GIS and GPS are branch of Geoinformatics discipline. They are all emerging fields and have huge application potential for resource development, planning and management. There is a good scope for scientists, engineers, academicians/researchers, NGOs, service and utility sector personnel, planners and decision makers as it facilitates better understanding, use and manages appropriately.
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WHAT IS REMOTE SENSING?

TEC Imagery Office - FAQs
Remote sensing is the collection or measurement of information about a target without being in physical contact with the object. Aircraft and satellites are the most common platforms for remote sensing observations. The term remote sensing is usually restricted to methods employing electromagnetic energy, such as light, heat, and radio waves, as the means of detecting and measuring target characteristics.
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FSP (GB) Ltd. of FSP GROUP
Detection of output voltage at a load remote from power supply, enabling the power supply to regulate output voltage and to compensate for voltage drop across power cables. Permits greater accuracy of regulation than local sensing.
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What remote sensing software does the ESALab have?

ESALab FAQs
Remote sensing software has considerably more capability for working with raster data files than do GIS software packages. If you are working with images consider using one or more of the following software packages: ERDAS Imagine 8.6 Professional (only available to the SNRE ESA Lab), PCI Geomatica 8.0 (available to install campus-wide, see http://gis.umich.edu), and Idrisi 32 (available to install campus-wide, see http://gis.umich.edu).
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What about privacy and GIS- remote sensing data? What about protecting personal or cultural stories?

FAQ: Frequently Asked Questions
Information privacy is an important issue! We recommend that teachers and students follow the Guidelines for Educators found within the Guidelines for Respecting Cultural Knowledge published by the Alaskan Native Knowledge Network. ANKN has a wealth of resources at www.ankn.uaf.edu While the use, and usefulness, of geospatial information technology continues to grow rapidly, its power to share and display information requires that it be applied with care.
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HOW ARE REMOTE SENSING SYSTEMS DIFFERENT?

TEC Imagery Office - FAQs
Important attributes of satellite remote sensing systems include spatial resolution, spectral coverage, and temporal frequency. Spatial resolution describes the level of detail, or smallest size of an object, that can be identified. Spectral coverage refers to how many different colors and different parts of the spectrum are measured. Systems today make from one to seven measurements of light energy for each target area.
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What does 0.02% of accuracy mean?

AND Weighing / MX FAQ
It’s the variation and repeatability of moisture content rate data where same sample is tested with the same conditions repeatedly. In statistics it is called standard deviation.
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What does "The remote name could not be resolved" mean?

Header
The error message "The remote name could not be resolved" means that your network connection has failed. In order to resolve this error, click on "Retry" in order to log back into CAREWare. This may take several tries over a period of time if your network connection has failed for some series reason.
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What does Warning: remote host denied X11 forwarding mean?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
Either the remote end has disabled X11 forwarding (ForwardX11 No in the config file), or either the xauth command or the X11 libraries were not found when compiling the server. You need to set the hostname to the fully qualified domain name for this to work. Some Linux distributions set the hostname to the first part of the FQDN only. This is an incorrectly configured Linux system; do a "cd /usr/lib; ln -s libc.sa libg.sa" as root to remedy this. For Solaris 2.4, this s a kernel bug.
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Where can I obtain remote sensing information?

Frequently asked questions
This information can be obtained from the EROS data center in Sioux Falls, South Dakota. You can link to that Internet site through our "Other Servers of Interest."
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Why is radar often used in remote sensing?

ASF's SAR FAQ
Why are radio waves, visible light, and infrared radiation the most common forms of electromagnetic radiation sensed by Earth observing satellites?)
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Where can I find remote sensing tutorials and information?

Land Cover Analysis - General FAQs
There are a number of Web-based tutorials and information pages available on remote sensing and geographic information systems (GIS).
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What is the Remote Sensing Study about?

Citizen Lake Monitoring: Frequently Asked Questions - WDNR
It is attempting to use a satellite to predict the trophic state of lakes using observations from space and data from the ground at a lake. For more information go the Remote Sensing page or the Satellite Lake Observatory Initiative (Exit DNR).
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What remote sensing path am I in?

Citizen Lake Monitoring: Frequently Asked Questions - WDNR
Your path will be listed at Remote Sensing on our website. If your path number is not there contact Central Office-Madison. The Official Internet Site for the Wisconsin Department of Natural Resources 101 S. Webster Street . PO Box 7921 . Madison, Wisconsin 53707-7921 . 608.266.2621
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Is there an affordable remote sensing software package?

ESALab FAQs
Yes, Idrisi has an education package that is reasonably priced. The program functions much like ERDAS Imagine and is similar in terms of capabilities.
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What does the UTM accuracy code mean?

Natural Heritage Information Centre -- Tracks and maintains ...
The UTM accuracy is an important factor to consider in the geographic query. All Element Occurrences are assigned a level of accuracy for the Easting and Northing data. The descriptions of the accuracy codes are listed in the table below.
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What does the accuracy measure in the Analyzer mean?

Proxel FAQ
The accuracy measure is an internal measure from the optimisation library software. The lower the value, the better the fit. This value you can be used to get a hint about the choice of good parameters. The value is not comparable between two different optimizations, e.g. if you choose other lines. But you can e.g. use the value to see if adding k1 and/or k2 when optimizing fish_r improves the result.
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What does local (remote) mean?

Debian -- Debian security FAQ
A:Some advisories cover vulnerabilities that cannot be identified with the classic scheme of local and remote exploitability. Some vulnerabilities cannot be exploited from remote, i.e. don't correspond to a daemon listening to a network port. If they can be exploited by special files that could be provided via the network while the vulnerable service is not permanently connected with the network, we write local (remote) in such cases.
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What does GIS do?

Clay County Frequently Asked Questions (FAQs)
County governments are increasingly required to streamline business practices while adhering to complex political or regulatory requirements. To do so, they must digest an immense amount of information to perform their duties in a fair and sound manner. Almost all of this information is in some way tied to a geographic element such as an address, parcel, postal code, Census block, or some other component.
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Q - What does remote ready mean? Does it come with a remote?

Vancouver Gas Fireplaces: FAQs
A - Remote ready means that you can turn the unit on and off via the remote (wired or wireless). This requires a millivolt valve that creates millionths of volts of electricity to control the valve. Remote ready units do not come with a remote because there are up to 20 different kinds of remotes.
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What does this remote-deactivation part in the license mean ?

dvb2000.org - GkTV FAQ
This way, we make it a little bit more difficult for the paytv-piracy mafia. If we find out that certain software versions are being modified illegally, this will allow us to deactivate them safely. Then your power cable is absent, the power supply is broken or the entire box is broken. You may need a JTAG interface to reinstall a working bootloader. You do not have a bootloader on your box. You will have to bring your box to a service station for repair.
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What are some useful conversion factors in remote sensing?

Land Cover Analysis - General FAQs
Note that glossary terms on this page will be followed by a icon, which is linked to a definition of the term.
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