Thomas Ottmann (auth.), Oliver Günther, Hans-Jörg Schek's Advances in Spatial Databases: 2nd Symposium, SSD '91 PDF

By Thomas Ottmann (auth.), Oliver Günther, Hans-Jörg Schek (eds.)

ISBN-10: 3540544143

ISBN-13: 9783540544142

Spatial database administration has develop into an enormous subarea of present database learn. learn during this region is frequently characterised by means of interdisciplinary cooperation: computing device scientists paintings with geographers andenvironmental scientists to supply larger entry to spatial databases of progressively expanding dimension. After the 1st Symposium on huge Spatial Databases (SSD '89) used to be held in Santa Barbara, California, in 1989 (and its court cases released as quantity 409 of this series), a moment symposium (SSD'91) was once held in Zurich, Switzerland. This court cases quantity includes the papers awarded at SSD '91. themes contain spatial information versions and entry tools, functionality reviews, geometric algorithms, spatial question languages and person interfaces, geographic info platforms, and object-oriented techniques.

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Extra resources for Advances in Spatial Databases: 2nd Symposium, SSD '91 Zurich, Switzerland, August 28–30, 1991 Proceedings

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CAUTIO N : If the onion smell is missing, don't try the plant. It could be F l y Poison or Death Camass (see pp. 208 and 209). Bulbs: cooked vegetable; seasoning; medicine. Bulblets: seasoning; pickle. Leaves: seasoning. 52 Lily Family DAY L I LY Hemerocallis fulva and H. flava SIZE: 2-3 fl. high HABITAT: Roadsides, edges of fields, and old homesites SEASON: Summer, flowers; spring through fall, tubers 53 Day iiiy IDENTIFYING CHARACTERISTICS: This is a plant that has escaped from cultivation and now grows wild over a large section of North America.

They can be eaten fresh or boiled as a vegetable. If they are thoroughly dried over a slow fire or in an oven, they can be ground into a flour that is one of the best wild flours available in North America. Chufa that has been roasted to a dark brown and ground makes a coffee-like hot beverage. A cold drink popular in Spain is made by soaking Chufa i n water for 2 days and then mashing it i n fresh water and sugar and straining out the solids. Dried tubers will keep almost indefinitely. Tubers: salad; cooked vegetable; coffee substitute; beverage; flour.

Each branch bears rows of pinnately compound leaflets in pairs that resemble birds' wings with the leaflets taking the place of feathers. Where the lower wing-shaped leaflets join the stalk there is usually a purplish nectar-producing organ. I n plants that have not been dis­ turbed or rained on recently, large droplets of sweet-tasting liquid frequently cling to the nectaries. The rhizome is about % in. thick, blackish, and slightly woody in texture. It is covered with hair-like roots and branches that spread extensively under large areas of ground.

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Advances in Spatial Databases: 2nd Symposium, SSD '91 Zurich, Switzerland, August 28–30, 1991 Proceedings by Thomas Ottmann (auth.), Oliver Günther, Hans-Jörg Schek (eds.)


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