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Spatial Resolution

GIS  Spatial Reference  Spatial Unit
04/21/2014

Spatial Resolution
Resolution is the minimum distance between two adjacent features or the minimum size of a feature, that can be detected by a remote sensing system.


Spatial resolution of crop models in the estimation of regional agroecological effects of climate change: how fine is fine enough?
William E. Easterling ...

Spatial Resolution
Spatial resolution refers to the size of the smallest object that can be resolved on the ground. In a digital image, the resolution is limited by the pixel size, i.e.

spatial resolution can be relatively low
e.g. grid cells covering large areas
historically, natural resource GIS have been raster-based ...

Spatial resolution refers to the size of a pixel that is recorded in a raster image - typically pixels may correspond to square areas ranging in side length from 1 to 1000 metres.

Based on the MADS object+relationship data model (see in the section 3) the MurMur project addresses two aspects of multiple representations: the modeling of multiple spatial resolution and the modeling of multiple viewpoints.

The spatial resolution of the AVHRR varies from 1.1 km2 at nadir to 12.6 km2 at the end of the scan line. The sensor scans throuah 110.8 as it examines the earth, producing a scanline of 2.925 km.

The TM sensor has a spatial resolution of 120 m for the thermal-IR band and 30 m for the six reflective bands.

The measure of size is referred to as spatial resolution. Spatial resolution reflects the smallest object that can be detected by a sensor. As an example, Landsat TM has a spatial resolution of 30 X 30 meters.

Its spatial resolution is determined by the resolution of the acquisition device and the quality of the original data source.

All spatial data should be to the same spatial resolution, or scale. It is not possible to get meaningful results from the combination of spatial data recorded to a scale of 1:250, as might be the case for an excavation site plan, ...

Figure 1 reflects how spatial resolution (scale) relates to the utility of fuels data for strategic versus tactical risk assessments. In general, the finer the spatial resolution, the better the data for detailed community-scale analysis.

The transformation into the YCbCr color model enables the next step, which is to reduce the spatial resolution of the Cb and Cr components (called "downsampling" or "chroma subsampling").

"Spatial Resolution" The smallest possible map feature that can be accurately displayed at a specified map scale. For example, in a 1:24000 scale map, a 50 foot distance between a roadway and railroad track centerline is one fortieth of an inch.

An apparent increase in spatial resolution achieved either by resampling image rasters or by combining images from different sensors of varying resolutions (such as SPOT panchromatic and TM multispectral).

Landsat TM - Landsat Thematic Mapper. Earth observation satellite with seven bands at 30m spatial resolution (TWS).
Layer - Distinct map theme. Usually a separate GIS file (TWS).

The spatial resolution is fairly gross (60 meters) compared with today's satellite images, but it is good enough to spot major changes in land cover (e.g. new housing developments, shopping centers, etc.).

To re-run it at higher spatial resolution or different settings, the user first loads the surface and sets the resolution, lighting, etc. Then internally the script generated by d.nviz is run.

between two independently measured or computed values or objects that can be distinguished by the measurement or analytical method, or sensor being considered or used. It provides a limit to precision and accuracy. Often called spatial resolution but ...

See also: See also: Resolution, Information, Model, GIS, Analysis

GIS  Spatial Reference  Spatial Unit
04/21/2014

 
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