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Satellite Imagery
Remotely sensed satellite imagery is becoming increasingly common as satellites equipped with technologically advanced sensors are continually being sent into space by public agencies and private companies around the globe.

Satellite Imagery: Digital data obtained from sensors carried in satellites. It includes collecting data both in the visible and non-visible portions of the electromagnetic spectrum. One system is the multispectral scanner carried in Landsat satellites.

More satellite imagery support
Improved support for RADARSAT-2 and SPOT 5 imagery, and added support for others. Added support for the community sensor model (CSM) and the pushbroom sensor model to help support more data and more analysis applications.

satellite image A picture of the earth taken from an earth-orbital satellite. Satellite images may be produced photographically or by on-board scanners (e.g., MSS). scale See map scale. scale bar A map element that shows the map scale graphically.

[edit] Satellite Images
Satellite images are available too, users can zoom in until they see cars and, in some cities, people can be seen walking in the street (appearing as tiny black dots). Some of the images are very high-quality, others are not, depending on the city.

[edit] ~ry
False color IR image of Washington DC, taken by Landsat 7.

~ry acquired daily at a variety of resolutions from a variety of sensors (i.e., Advanced Very High Resolution Radiometer (AVHRR) and Geostationary Operational Environmental Satellite (GOES));
Airborne gamma radiation survey snow water equivalent data sets; and ...

See Image and Image Processing. Land Records Glossary Page 6
Scale ...

An image of a portion of the surface of the earth that is captured by image sensors onboard an orbiting satellite and subsequently transferred to a control station on the ground.
Scale ...

Landsat satellite imagery and BIL information are used in RS Landsat. In one format, using BIL, pixel values from each band are pulled out and combined. Programs that use this kind of information include IDRISI, GRASS, and MapFactory.

Adding a ~ry Thematic Base Layer using the OpenLayers Plugin
The OpenLayers plugin is a great tool for presenting your vector data layers on top of Google, Bing, Yahoo and OpenStreetMap thematic layers. To add the layer select Plugins
OpenLayers plugin ...

Classifying ~s with MultiSpec
Designing for Visibility
Zakem Bridge View Corridors ...

Free EarthSat ~ry
The preceding article demonstrated how to access and process free Canadian Landsat 7 data from the Canadian Geogratis site. Unfortunately, this site only offers Canadian coverage.

Use aerial or ~ry
Analyze the land around a property
Create a 3-D image of a parcel
Make GPS work for your land trust
Use GIS images in presentations
Use GIS to create maps for offset publications
Print great maps from your GIS ...

Cox, C. 1992. ~ry, aerial photography and wetland archaeology. World Archaeology 24 (2): 249-67.
Defence Mapping Agency, 1984. Geodesy for the Layman. US Naval Observatory Report TR 80-003, Washington D.C., 16th March 1984.

Figure 3. A ~ was draped on a 3-D terrain model using Able Software's R2V package.

The more adjacent columns having the same value, the greater the compression.
~ A picture of the earth taken from an earth-orbital satellite. ~s may be produced photographically or by on-board scanners (e.g., MSS).

Even aerial and ~ry can be incorporated into a GIS and viewed along with other data for the same area, as long as the ground extent of the image can be identified. The most powerful GIS applications use data taken from a range of different sources.
Ordnance Survey data and GIS ...

on the other hand, ~ry, which is an important source of environmental data is raster-based
Thematic ...

If color quality of ~ color composites seems to appear poor, run r.colors on the selected satellite channels.

For example, digital ~s can be analyzed to produce a map like layer of digital information about vegetative covers. [LINK] [LINK] Likewise, census or hydrologic tabular data can be converted to map-like form, serving as layers of thematic information in a GIS.

Aerial photography differs from ~ry in that the results are almost instantaneous and require only developing, as opposed to images which must undergo a great deal of processing before electromagnetic signals resemble real world features.

~ry such as Landsat TM and SPOT provide multispectral images of the earth, some containing seven or more bands. Base map A map showing planimetric, topographic, geological, political and/or cadastral information that may appear in many different types of maps.

SPOT ~ry for mapping Kirtland's warbler wintering habitat in the Bahamas. Wildl. Soc. Bull. 18:252-257. MURPHY, D. D., AND B. D. NOON. 1991. Coping with uncertainty in wildlife biology. J. Wildl. Manage. 55:773-782. NELSON, J. W., AND R. A. WISHART. 1988.

IKONOS DEM Overlays - The author demonstrates how one can easily use free ortho rectified, aligned and georeferenced ~ry along with free data from the gisdatadepot and create stunning 3D imagery. (Oct. 2001) ...

Imagine is a specialized image processing software application developed mainly for analyzing remotely sensed ~ry. ArcGIS supports Imagine files with its Imagine Image Format Extension. Once the extension is loaded, Imagine files can be used as image data layers.

For example, digital ~s generated through remote sensing can be analyzed to produce a map-like layer of digital information about vegetative covers.

A GIS assembles information from a several of sources, including ground surveys, existing maps, aerial photos, and ~ry.

Natural resource-oriented users will find that up-to-date ~ry, aerial photographs, as well as topographic, climatic and hydrographic data are all useful in environmental planning and resource monitoring.

Image map - (1) A map created from aerial photographs or ~s by assembling them spatially (i.e. making a mosaic), correcting them geometrically (i.e. georeferencing and scaling) and adding cartographic symbols and place names, making it usable just like an ordinary line map.

These may include such items as digital terrain data, orthophotographs, and ~ry. These data may provide tremendous capability, but must be managed in ways different from traditional vector information. Conversion to a standard format is relatively straightforward.

(GTC) are developing a prototype GIS tool that integrates ~ry with layers of statewide GIS datasets. In addition, standard business process and site-selection methods are being created in the hopes of developing new industry standards.

National government users that employ aerial photography or ~ry in mapping or intelligence activities use Bentley Descartes. These include military, census, cadastre, and mapping agencies.

Gnomonic projection on a dodecahedron, ~ry by NASA's The Blue Marble Next Generation project (data from April 2004, world topography + bathymetry), poles on vertices (1464 KB PDF)
Gnomonic projection on a dodecahedron, black & white (color it yourself), poles on faces (668 KB PDF) ...

Can a property ownership map be related to a ~, a timely indicator of land uses? Yes, but, because digital data are collected and stored in various ways, the two data sources may not be entirely compatible. So a GIS must be able to convert data from one structure to another.

ArcGIS helped the South Carolina Air National Guard quickly process ~ry after Hurricane Irene.
MoD supplies troops with more up-to-date mapping services
The United Kingdom’s Ministry of Defence is implementing Esri’s GEO Viewer for its troops in Afghanistan.

~ry is an example. Primary Non-Observable data are datasets you collect, but the characteristic or behavior is not observed. Surveys and interviews that you administer are examples. Secondary Non-Observable data are datasets that someone else collects and does not observe.

scientific/environmental data needs Natural resource-oriented users will find that up-to-date ~ry, aerial photographs, as well as topographic, climatic and hydrographic data are all useful in environmental planning and resource monitoring.

Meteor Impact Sites - ~s
Geology Dictionary
Geologist Jobs
Highest Points in All 50 States ...

The technique of collecting information from a distance. Most common mediums used are aerial photography and ~ry. Before the advent of photography, remote sensing was accomplished in such ways as information collection from air ballons. See: Remote-Sensing Technologies.

Modern maps are usually based on overlapping photographs taken from an aircraft (aerial photography) or digital images from a satellite (~ry). In these cases the Survey Control not only scales and orients the map, it is also used to remove any distortions in the photograph/imagery.

~ry has enabled meteorologists to improve the accuracy of such maps.

The raster image can be a raw ~, an oblique or vertical aerial photo or a scanned topographic map.

To establish the relationship of one data set to another through reference to common locations in both data sets. For example, a ~ can be georeferenced to data stored in a coverage. Georeferencing requires that data be placed in a common coordinate system.
GIF ...

Change detection often involves comparing aerial photographs or ~ry of the area taken at different times. The process is most frequently associated with environmental monitoring, natural resource management, or measuring urban development. [Category=Geospatial ] ...

Draw imagines from aerial photography or ~ry.

Event Tracking ...

Of course, after I somehow lose my progress, I went to redo all of my work to find that when I set the location, only part of the viewport is taken up by the ~ry. Also, my when I import shapefiles into the drawing, they do not line up. The coordinate system I set is KY83-N.

Staff from the US Geological Survey (USGS) answer questions about aerial photographs, maps, ~ry, computer programs, data formats, data standards, and digital cartographic data. To contact your local ESIC, call 1-888-ASK-USGS or visit the website.

[data models] A representation of the world as a surface divided into a regular grid of cells. Raster models are useful for storing data that varies continuously, as in an aerial photograph, a ~, a surface of chemical concentrations, or an elevation surface.

Drape: Involves laying features over a digital terrain model to provide information on features that lie on the terrain. Ther terrain model provides the shape of the terrain. Draped features may then include a ~ of the terrain to show land-use, ...

Raster Image Support, for use of raster images such as scanned paper maps, ~s, photographs, and logos; provides a detailed content layer for your maps.

Raster data is best suited for continuous data such as slope, rainfall, or the amount of light reflecting off the ground (as in a photograph). Aerial photographs and ~s are examples of raster images used in mapping.

These involve warping a data layer stored in one data model, either raster or vector, to another data layer stored in the opposite data model. For example, often classified ~ry may require warping to fit an existing forest inventory layer, ...

Ocean Remote Sensing Online GIS Open Source of GIS Overview Photometry Photosensor Poster Projections Projections and Coordinate Systems Radar Radiometry Reef GIS Reemote Sensing Dictionary Regional Gis News Remote Sensing Remote Sensing Glossary Review Risk Management Satellite ~ Data ...

Dummies Guide to Search for ~s
Soil Survey and GIS
GIS and Remote Sensing
Open Access English Language Journals Portal
Basics of GPS and how it works ?
Geo tagging in GIS
Options Analysis in Irrigation Systems - OASIS
Water Resource Types
Basics of Digital Mapping ...

See also: See also: What is the meaning of Satellite, Image, Information, GIS, Map?

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