01: /*
02: * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
03: * for visualizing and manipulating spatial features with geometry and attributes.
04: *
05: * Copyright (C) 2003 Vivid Solutions
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * as published by the Free Software Foundation; either version 2
10: * of the License, or (at your option) any later version.
11: *
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU General Public License for more details.
16: *
17: * You should have received a copy of the GNU General Public License
18: * along with this program; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20: *
21: * For more information, contact:
22: *
23: * Vivid Solutions
24: * Suite #1A
25: * 2328 Government Street
26: * Victoria BC V8T 5G5
27: * Canada
28: *
29: * (250)385-6040
30: * www.vividsolutions.com
31: */
32:
33: package com.vividsolutions.jump.workbench.ui.plugin.scalebar;
34:
35: import java.util.ArrayList;
36: import java.util.Collection;
37:
38: /**
39: * This will eventually implement an interface called MeasurementSystem.
40: */
41: public class MetricSystem {
42: private double modelUnitsPerMetre;
43:
44: public MetricSystem(double modelUnitsPerMetre) {
45: this .modelUnitsPerMetre = modelUnitsPerMetre;
46: }
47:
48: public Collection createUnits() {
49: ArrayList units = new ArrayList();
50:
51: //Leave out the lesser known units, like fm. [Jon Aquino]
52: units.add(new Unit("km", 1E3 * modelUnitsPerMetre));
53: units.add(new Unit("m", 1E0 * modelUnitsPerMetre));
54: units.add(new Unit("mm", 1E-3 * modelUnitsPerMetre));
55: units.add(new Unit("um", 1E-6 * modelUnitsPerMetre));
56: units.add(new Unit("nm", 1E-9 * modelUnitsPerMetre));
57: units.add(new Unit("pm", 1E-12 * modelUnitsPerMetre));
58:
59: return units;
60: }
61: }
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