Can someone suggest a source for Canadian elevation data better or equivalent to 1 arc-second? I have a good data source for Ontario but for other provinces folks often recommend Geobase which claims that their elevation data ranges between 0.75 arc seconds to a maximum 3 arc seconds depending on latitude.

Calculate Meters. Calculate Arc-Seconds. 1 degree° = 60 arc minutes '. 1 arc minute ' = 60 arc seconds ''. 1 arc second '' at equatorial sea level = 1852m/60 = 30.86666667m. Formlua: cos (degree latitude) * (1852/60) Example 0° latitude and 1 arc second: cos (0) * 30.866666667 = 1 * 30.866666667 = 30.866666667.

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1 arc second to meters

While this is adequate for rough locations on a global scale, for detailed work it will be inadequate. The seamless 1 arc-second DEM is available as pre-staged products tiled in 1 degree blocks in Erdas .img, ESRI arc-grid, and grid float formats. The seamless 1 arc-second DEM layer is updated continually as new data become available. Other 3DEP products are nationally seamless DEMs in resolutions of 1 and 1/3 arc-second.

Data Set. Coverage. Resolution. Data format. Date of data. TERREL dataset keyword. GMTED2010 1. Global. 30 arc-second (~1 km) 15 arc-second (~500m)

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GlobCover: 20 arc-seconds (~450 m at 43 deg lat). 3) and the calculations. ASTER DEM (1 arc-second) longitude: 1 deg * 3600 arc-sec/deg * 1 pixel/arc-sec

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Eureka, California 1/3 Arc-second MHW Coastal Digital Elevation Model Cell size for the DEMs ranges from 1/3 arc-second (~10 meters) to 3 arc-seconds Fort Bragg, California 1/3 arc-second NAVD 88 Coastal Digital Elevation Model DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~30 meters). av AH Ehsani · 2008 · Citerat av 7 — 90 m resolution) grid for approximately 80 % of Earth's land surface. The X-band SRTM data were processed with a 1 arc second (approx. 30 m A positioning accuracy equal to or better than 5 arc second. Article 4(1) and Article 11 of Council Directive 94/45/EC of 22 September 1994 on the balconies, trees and other obstacles and at least 0,5 m from the nearest building in the case Many translated example sentences containing "arc of" – Swedish-English in the vicinity of the sampler (normally some metres away from buildings, balconies, defined in point 2.2.1 of Annex II and on the arc perpendicular to this segment. in a second processing stage by fusion in an electric arc furnace, come under achieved by thermal control of the laser tube's length to within nanometres up to 25 revolutions.
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i beleive 1arc-second is roughly 30m resolution whereas 3 arc-second 90m. LiDAR-based elevation rasters from the National Map are 1/9 arc-second products (about 3-meter resolution) while elevation based on 10-meter USGS DEMs are 1/3 arc-second products. There may be 1/9 arc-second National Map elevation products that are not based on LiDAR (metadata should described source of particular data).

There is no conversion. An arc second is a measure of angle; it is one sixtieth of an arc minute, which is one sixtieth of a degree, which is 1/360th of a circle. A light year is a measure of distance, the dista 1/3rd Arc-second Digital Elevation Models (DEMs) - USGS National Map. This layer of the National Elevation Dataset (NED) is 1/3 arc-second (approximately 10 m) resolution.
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An arc second is a measure of angle; it is one sixtieth of an arc minute, which is one sixtieth of a degree, which is 1/360th of a circle. Parsec is obtained by the use of parallax and trigonometry, and is defined as the distance at which one astronomical unit subtends an angle of one arcsecond (1 / 3600 of a degree). This corresponds to 648 000 / π astronomical units, i.e. 1 pc = 1/tan(1″) au. The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun. Since an arc second is 1/3600 of a degree, elevation values in a 3 arc-second DEM are spaced 1/1200 degree apart, representing a grid cell about 66 meters "wide" by 93 meters "tall" at 45º latitude.

Some of the advanced gratings manufactured were 10 meters long . vision systems that could take 2000x2000 pixel images at 2 meter per second objects I was technical liason for the main transmissions (that were specified 1 arc minute

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(92,955,807.273 "A star with a parallax of 1 arcsecond has a distance of 1 Parsec." 1 parsec (pc) is Jun 3, 2015 One arc second represents approximately a 30-meter grid cell. Accordingly, a one-third arc second of measurement is approximately ten meters Feb 4, 2014 second (~10-meters). The current release of 1/3-arc-second NED (February 4, 2014) includes migrated high- resolution source data and IFSAR 1 arcsecond = 1/60 arcminutes = 1/3600 deg So roughly 200,000 times your coin diameter, so if about 1 cm = 0.01m, then distance is 2000m and a few km as Apr 26, 2012 National Elevation Dataset - NAVD88 Meters - 1/3rd-Arc-Second (Approx. 10m).