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| 02498cam 2200373zi 4500 |
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| 001 | 9.892199 |
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| 003 | CaOODSP |
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| 005 | 20221107173113 |
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| 006 | m o d f |
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| 007 | cr |n||||||||| |
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| 008 | 201006s1992 oncb ob f|0| 0 eng d |
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| 040 | |aCaOODSP|beng|erda|cCaOODSP |
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| 041 | |aeng|bfre |
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| 043 | |an-cn--- |
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| 086 | 1 |aCo24-3/7-92-002E-PDF |
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| 100 | 1 |aWhitteker, J. H. |q(James Howard), |d1940- |eauthor. |
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| 245 | 10|aStorage specifications for 500-metre-grid terrain data / |cby J.H. Whitteker. |
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| 264 | 1|aOttawa : |bGovernment of Canada, Department of Communications = Gouvernement du Canada, Ministère des Communications, |c1992. |
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| 300 | |a1 online resource (24 pages) : |bmaps. |
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| 336 | |atext|btxt|2rdacontent |
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| 337 | |acomputer|bc|2rdamedia |
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| 338 | |aonline resource|bcr|2rdacarrier |
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| 490 | 1 |aCRC report ; |vCRC-RP-92-002 |
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| 500 | |aDigitized edition from print [produced by Innovation, Science and Economic Development Canada]. |
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| 500 | |a"August 1992." |
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| 504 | |aIncludes bibliographical references (page 14). |
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| 520 | |a"Terrain data for much of Canada and some adjoining U.S. territory are stored compactly in a binary format. The format was designed to be used for obtaining elevations and surface type information along radio propagation paths, but it may be used whenever compact, rapidly-accessible terrain data are required. Terrain points are the intersections of a 500-metre grid defined on the UTM (Universal Transverse Mercator) co-ordinate system. A teach point, an elevation is stored, and a code indicating surface type (bare ground, tree covered, lake, sea, buildings) is also stored wherever it is available. The information for each point occupies 16 bits. A record occupies 1024 bytes, and corresponds to a 7.5 x 15.5-km rectangle. With this arrangement, points that are geographically close together are usually also close together in the data file. A file represents an area 40 of latitude by 6° of longitude. Each file contains its own index in the first six records"--Abstract. |
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| 546 | |aIncludes abstract in French. |
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| 650 | 0|aTopographic maps|xData processing. |
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| 650 | 6|aCartes topographiques|xInformatique. |
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| 710 | 1 |aCanada. |bDepartment of Communications, |eissuing body. |
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| 830 | #0|aCRC report ;|vCRC-RP-92-002.|w(CaOODSP)9.882492 |
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| 856 | 40|qPDF|s3.03 MB|uhttps://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-7-92-002-eng.pdf |
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