1
2 ///////////////////////////////////////////////////////////
3 // //
4 // SAGA //
5 // //
6 // System for Automated Geoscientific Analyses //
7 // //
8 // Tool Library //
9 // climate_tools //
10 // //
11 //-------------------------------------------------------//
12 // //
13 // air_pressure.cpp //
14 // //
15 // Copyright (C) 2020 by //
16 // Olaf Conrad //
17 // //
18 //-------------------------------------------------------//
19 // //
20 // This file is part of 'SAGA - System for Automated //
21 // Geoscientific Analyses'. SAGA is free software; you //
22 // can redistribute it and/or modify it under the terms //
23 // of the GNU General Public License as published by the //
24 // Free Software Foundation, either version 2 of the //
25 // License, or (at your option) any later version. //
26 // //
27 // SAGA is distributed in the hope that it will be //
28 // useful, but WITHOUT ANY WARRANTY; without even the //
29 // implied warranty of MERCHANTABILITY or FITNESS FOR A //
30 // PARTICULAR PURPOSE. See the GNU General Public //
31 // License for more details. //
32 // //
33 // You should have received a copy of the GNU General //
34 // Public License along with this program; if not, see //
35 // <http://www.gnu.org/licenses/>. //
36 // //
37 //-------------------------------------------------------//
38 // //
39 // e-mail: oconrad@saga-gis.de //
40 // //
41 // contact: Olaf Conrad //
42 // Institute of Geography //
43 // University of Hamburg //
44 // Germany //
45 // //
46 ///////////////////////////////////////////////////////////
47
48 //---------------------------------------------------------
49 #include "air_pressure.h"
50
51
52 ///////////////////////////////////////////////////////////
53 // //
54 // //
55 // //
56 ///////////////////////////////////////////////////////////
57
58 //---------------------------------------------------------
CAirPressure_Scaling(void)59 CAirPressure_Scaling::CAirPressure_Scaling(void)
60 {
61 Set_Name (_TL("Air Pressure Adjustment"));
62
63 Set_Author ("O.Conrad (c) 2020");
64
65 Set_Description (_TW(
66 "This tool adjusts air pressure values to the elevation "
67 "using the barometric formula. Default values refer to "
68 "the international standard atmosphere. "
69 ));
70
71 //-----------------------------------------------------
72 Parameters.Add_Grid_or_Const("", "P", _TL("Air Pressure" ), _TL("[hPa]" ), 1013.25 , 0. , false, 0., false, false);
73 Parameters.Add_Grid_or_Const("", "Z", _TL("Air Pressure Elevation"), _TL("[m]" ), 0. , 0. , false, 0., false, false);
74 Parameters.Add_Grid_or_Const("", "T", _TL("Temperature" ), _TL("[Celsius]"), 0. , -273.15, false, 0., false, false);
75 Parameters.Add_Grid_or_Const("", "L", _TL("Temperature Lapse Rate"), _TL("[K/m]" ), 0.0065, 0. , false, 0., false, false);
76
77 Parameters.Add_Grid("",
78 "DEM" , _TL("Elevation"),
79 _TL("[m]"),
80 PARAMETER_INPUT
81 );
82
83 Parameters.Add_Grid("",
84 "P_ADJ" , _TL("Adjusted Air Pressure"),
85 _TL(""),
86 PARAMETER_OUTPUT
87 );
88 }
89
90
91 ///////////////////////////////////////////////////////////
92 // //
93 ///////////////////////////////////////////////////////////
94
95 //---------------------------------------------------------
On_Parameters_Enable(CSG_Parameters * pParameters,CSG_Parameter * pParameter)96 int CAirPressure_Scaling::On_Parameters_Enable(CSG_Parameters *pParameters, CSG_Parameter *pParameter)
97 {
98 return( CSG_Tool_Grid::On_Parameters_Enable(pParameters, pParameter) );
99 }
100
101
102 ///////////////////////////////////////////////////////////
103 // //
104 ///////////////////////////////////////////////////////////
105
106 //---------------------------------------------------------
On_Execute(void)107 bool CAirPressure_Scaling::On_Execute(void)
108 {
109 CSG_Grid *pP = Parameters("P")->asGrid(); double P = Parameters("P")->asDouble();
110 CSG_Grid *pZ = Parameters("Z")->asGrid(); double Z = Parameters("Z")->asDouble();
111 CSG_Grid *pT = Parameters("T")->asGrid(); double T = Parameters("T")->asDouble();
112 CSG_Grid *pL = Parameters("L")->asGrid(); double L = Parameters("L")->asDouble();
113
114 CSG_Grid *pDEM = Parameters("DEM" )->asGrid();
115 CSG_Grid *pPadj = Parameters("P_ADJ")->asGrid();
116
117 //-----------------------------------------------------
118 for(int y=0; y<Get_NY() && Set_Progress(y); y++)
119 {
120 double py = Get_YMin() + y * Get_Cellsize();
121
122 #pragma omp parallel for
123 for(int x=0; x<Get_NX(); x++)
124 {
125 double Padj = -1.;
126
127 if( !pDEM->is_NoData(x, y) )
128 {
129 double px = Get_XMin() + x * Get_Cellsize(),
130 _P = P, _Z = Z, _T = T, _L = L;
131
132 if( (!pP || pP->Get_Value(px, py, _P))
133 && (!pZ || pZ->Get_Value(px, py, _Z))
134 && (!pT || pT->Get_Value(px, py, _T))
135 && (!pL || pL->Get_Value(px, py, _L)) )
136 {
137 Padj = _P * pow(1. - (_L * (pDEM->asDouble(x, y) - _Z) / (273.15 + _T)), 5.255);
138 }
139 }
140
141 if( Padj < 0. )
142 {
143 pPadj->Set_NoData(x, y);
144 }
145 else
146 {
147 pPadj->Set_Value(x, y, Padj);
148 }
149 }
150 }
151
152 //-----------------------------------------------------
153 return( true );
154 }
155
156
157 ///////////////////////////////////////////////////////////
158 // //
159 // //
160 // //
161 ///////////////////////////////////////////////////////////
162
163 //---------------------------------------------------------
164