Datenbank-Dokumentation

Tabelle polygone_vereinfacht(↩ zurück zur Übersicht)

Beschreibung
Enthält mit dem Douglas-Peucker-Algorithmus simplifizierte Varianten der Polygondaten aus der Tabelle `Orte`, sowie (für bestimmte `Kategorien`) Hexagone, die dem jeweiligen Polygon möglichst gut entsprechen.

Spalten
Der Name von Spalten, die Teil des Primärschlüssels sind wird fett dargestellt, die Namen von Fremdschlüsseln unterstrichen. Kursivierte Werte im Feld Datentyp bedeuten, dass der Wert optional (nullable) ist.
SpaltennameDatentypMögliche WerteBeschreibung
id_ortint(10) unsignedbeliebigFremdschlüssel, der auf die Tabelle `orte` verweist.
geodaten

geometry

Dieser Datentyp speichert geometrische Daten in MySQL-Datenbanken. Die einfachste Möglichkeit diese manuell einzutragen, ist die Verwendung der GeomFromText-Funktion. Diese erlaubt die Eingabe der Daten im WKT-Format.
Alle geographischen Koordinaten in VerbaAlpina werden in der Reihenfolge <Längengrad>, <Breitengrad> angegeben. Die Eingabe eines Punktes mit den Koordinaten Breitengrad 48.135876 und Längengrad 11.583720 könnte somit folgendermaßen über die phpMyAdmin-Oberfläche angegeben werden:

  • Auswahl von "GeomFromText" in der Spalte "Funktion"
  • Eingabe von
    POINT(11.583720 48.135876)
    in der Spalte "Wert"
beliebigDie simplifizierten Geodaten.
epsilonfloat(5,4)beliebigDie Toleranz beim Douglas-Peucker-Algorithmus bzw. -1 für Hexagone.
mittelpunkt

point

Dieser Datentyp speichert geometrische Daten in MySQL-Datenbanken. Die einfachste Möglichkeit diese manuell einzutragen, ist die Verwendung der GeomFromText-Funktion. Diese erlaubt die Eingabe der Daten im WKT-Format.
Alle geographischen Koordinaten in VerbaAlpina werden in der Reihenfolge <Längengrad>, <Breitengrad> angegeben. Die Eingabe eines Punktes mit den Koordinaten Breitengrad 48.135876 und Längengrad 11.583720 könnte somit folgendermaßen über die phpMyAdmin-Oberfläche angegeben werden:

  • Auswahl von "GeomFromText" in der Spalte "Funktion"
  • Eingabe von
    POINT(11.583720 48.135876)
    in der Spalte "Wert"
beliebigDer geometrische Mittelpunkt des vereinfachten Polygons.
Ausschnitt
id_ortgeodatenepsilonmittelpunkt
45565POLYGON((1.30219960212713 44.4762725830078,1.31163549423218 44.4685592651368,1.32100939750671 44.4696197509766,1.32887721061707 44.4659118652343,1.33820915222179 44.4658279418946,1.33820915222179 44.4658279418946,1.34154438972485 44.4562873840332,1.35463321208965 44.4531898498536,1.35463321208965 44.4531898498536,1.35520303249365 44.4526138305664,1.35520303249365 44.4526138305664,1.34165370464325 44.4388427734375,1.32858240604401 44.4354820251464,1.32152986526489 44.427101135254,1.32483696937561 44.4210739135743,1.32483696937561 44.4210739135743,1.29427230358118 44.4309959411622,1.29025566577911 44.4408302307128,1.28070437908173 44.4416427612306,1.27301621437084 44.4501686096191,1.27301621437084 44.4501686096191,1.27336311340338 44.4515686035157,1.27336311340338 44.4515686035157,1.28280532360088 44.45316696167,1.29499232769018 44.4638099670411,1.30219960212713 44.4762725830078))0.0006POINT(1.3151434183121204 44.45029632568364)
61482POLYGON((6.71820116043102 46.5129814147949,6.71131086349499 46.5084457397462,6.70627117156982 46.4979057312011,6.70627117156982 46.4979057312011,6.68108510971064 46.5052032470704,6.67433404922491 46.5052719116211,6.67433404922491 46.5052719116211,6.67831897735601 46.5113945007325,6.6782422065736 46.5129928588868,6.67685890197754 46.5144691467286,6.67685890197754 46.5144691467286,6.68406009674072 46.5194969177246,6.6906561851502 46.5214653015137,6.69311189651495 46.5253715515136,6.70063591003424 46.5324821472168,6.71056222915661 46.5372543334962,6.71056222915661 46.5372543334962,6.71195888519293 46.5362548828126,6.71057510375988 46.5349922180176,6.7109169960022 46.5332908630372,6.71666812896729 46.5297508239746,6.71582984924322 46.5270538330078,6.7171049118042 46.5245742797852,6.71712684631353 46.5201263427734,6.72044992446911 46.5186271667481,6.72044992446911 46.5186271667481,6.71790313720714 46.5145874023437,6.71820116043102 46.5129814147949))0.0006POINT(6.701135511751583 46.51916744090895)
61071POLYGON((8.5762300491333 46.2937011718751,8.57754802703857 46.2964401245117,8.58199501037603 46.3002891540528,8.58219814300537 46.3053588867187,8.57428455352795 46.3127059936524,8.56947422027588 46.3190422058105,8.565993309021 46.3258285522461,8.56562805175781 46.3310546875001,8.56562805175781 46.3310546875001,8.55362510681158 46.3391227722169,8.54287528991699 46.3430976867676,8.52705097198486 46.3358116149902,8.52705097198486 46.3358116149902,8.5294189453125 46.3329658508301,8.53102016448986 46.3284950256349,8.53102874755871 46.3251533508301,8.52350997924816 46.3089065551758,8.5213556289674 46.307586669922,8.51484394073486 46.3073806762696,8.50780010223394 46.3057098388673,8.50780010223394 46.3057098388673,8.51382732391357 46.3003883361817,8.52124214172363 46.2972068786622,8.52383518219006 46.2973861694336,8.52764225006115 46.2998428344727,8.53216266632074 46.2986106872559,8.53602981567388 46.2953147888185,8.54425621032715 46.2914848327638,8.54503726959223 46.2863006591797,8.5518159866333 46.2823371887208,8.56249713897705 46.2794876098633,8.56788635253901 46.2818679809571,8.56788635253901 46.2818679809571,8.56655883789057 46.2840461730958,8.56667900085461 46.2857856750489,8.5694780349732 46.2871475219727,8.57365798950207 46.2926139831544,8.5762300491333 46.2937011718751))0.0006POINT(8.547212214083315 46.306295034047764)
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