SpatialPositionModel_dialog_base.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>SpatialPositionModel_dialog_base</class>
 <widget class="QDialog" name="SpatialPositionModel_dialog_base">
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  <property name="windowTitle">
   <string>Stewart Potentials</string>
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    <font>
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   <property name="currentIndex">
    <number>0</number>
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   <widget class="QWidget" name="tab">
    <attribute name="title">
     <string>Stewart potentials</string>
    </attribute>
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       <layout class="QGridLayout" name="gridLayout">
        <item row="12" column="0">
         <widget class="QLabel" name="label_27">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Output&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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         </widget>
        </item>
        <item row="10" column="2">
         <spacer name="verticalSpacer_9">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
          <property name="sizeType">
           <enum>QSizePolicy::Fixed</enum>
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          <property name="sizeHint" stdset="0">
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            <width>20</width>
            <height>10</height>
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         </spacer>
        </item>
        <item row="2" column="2" colspan="2">
         <widget class="QgsFieldExpressionWidget" name="mFieldExpressionWidget">
          <property name="filters">
           <set>QgsFieldProxyModel::Numeric</set>
          </property>
         </widget>
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        <item row="5" column="3">
         <widget class="QDoubleSpinBox" name="StewartdoubleSpinBox_resolution">
          <property name="decimals">
           <number>4</number>
          </property>
          <property name="minimum">
           <double>0.000100000000000</double>
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          <property name="maximum">
           <double>150000.000000000000000</double>
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          <property name="value">
           <double>10.000000000000000</double>
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        <item row="12" column="2">
         <widget class="QRadioButton" name="radioButton_vector">
          <property name="text">
           <string>Vector</string>
          </property>
          <property name="checked">
           <bool>true</bool>
          </property>
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        <item row="12" column="3">
         <widget class="QRadioButton" name="radioButton_raster">
          <property name="text">
           <string>Raster</string>
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         </widget>
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        <item row="8" column="2" colspan="2">
         <widget class="QgsMapLayerComboBox" name="StewartComboBox_unknwPts">
          <property name="enabled">
           <bool>false</bool>
          </property>
          <property name="currentIndex">
           <number>-1</number>
          </property>
          <property name="filters">
           <set>QgsMapLayerProxyModel::PointLayer</set>
          </property>
         </widget>
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        <item row="9" column="0">
         <widget class="QLabel" name="label_29">
          <property name="enabled">
           <bool>false</bool>
          </property>
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Custom distance matrix (opt.)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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         <widget class="QLabel" name="label_30">
          <property name="enabled">
           <bool>false</bool>
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          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Location of unknown points (opt.)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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        <item row="2" column="0">
         <widget class="QLabel" name="label_37">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Custom expression (opt.)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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         </widget>
        </item>
        <item row="3" column="2">
         <spacer name="verticalSpacer">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
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          <property name="sizeType">
           <enum>QSizePolicy::Fixed</enum>
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          <property name="sizeHint" stdset="0">
           <size>
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            <height>10</height>
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        <item row="6" column="3">
         <widget class="QDoubleSpinBox" name="StewartdoubleSpinBox_span">
          <property name="decimals">
           <number>4</number>
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          <property name="minimum">
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          <property name="maximum">
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          <property name="value">
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        <item row="0" column="2" colspan="2">
         <widget class="QgsMapLayerComboBox" name="StewartComboBox_pts">
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          <property name="filters">
           <set>QgsMapLayerProxyModel::PointLayer</set>
          </property>
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        <item row="1" column="2" colspan="2">
         <widget class="QgsFieldComboBox" name="StewartComboBox_field">
          <property name="minimumContentsLength">
           <number>0</number>
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          <property name="filters">
           <set>QgsFieldProxyModel::Numeric</set>
          </property>
         </widget>
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        <item row="7" column="2">
         <widget class="QLabel" name="label_6">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Beta&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="0" column="0">
         <widget class="QLabel" name="label">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Point layer&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="5" column="2">
         <widget class="QLabel" name="label_4">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Resolution &lt;span style=&quot; font-size:10pt;&quot;&gt;(&lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-style:italic;&quot;&gt;km&lt;/span&gt;&lt;span style=&quot; font-size:10pt;&quot;&gt;)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="7" column="3">
         <widget class="QDoubleSpinBox" name="StewartdoubleSpinBox_beta">
          <property name="decimals">
           <number>2</number>
          </property>
          <property name="minimum">
           <double>0.000000000000000</double>
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          <property name="maximum">
           <double>100.000000000000000</double>
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          <property name="value">
           <double>1.000000000000000</double>
          </property>
         </widget>
        </item>
        <item row="6" column="2">
         <widget class="QLabel" name="label_5">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Span &lt;span style=&quot; font-size:10pt;&quot;&gt;(&lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-style:italic;&quot;&gt;km&lt;/span&gt;&lt;span style=&quot; font-size:10pt;&quot;&gt;)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="1" column="0">
         <widget class="QLabel" name="label_2">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Field name&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="4" column="2">
         <widget class="QLabel" name="label_24">
          <property name="text">
           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Spatial interaction function&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
        <item row="4" column="3">
         <widget class="QComboBox" name="StewartcomboBox_function">
          <item>
           <property name="text">
            <string>Exponential</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>Pareto</string>
           </property>
          </item>
         </widget>
        </item>
        <item row="9" column="2" colspan="2">
         <widget class="QgsMapLayerComboBox" name="StewartComboBox_matdist">
          <property name="enabled">
           <bool>false</bool>
          </property>
          <property name="currentIndex">
           <number>-1</number>
          </property>
          <property name="filters">
           <set>QgsMapLayerProxyModel::NoGeometry|QgsMapLayerProxyModel::PluginLayer</set>
          </property>
         </widget>
        </item>
        <item row="1" column="1">
         <widget class="QToolButton" name="clean_field">
          <property name="font">
           <font>
            <family>Monospace</family>
            <weight>75</weight>
            <bold>true</bold>
           </font>
          </property>
          <property name="text">
           <string notr="true"/>
          </property>
          <property name="iconSize">
           <size>
            <width>16</width>
            <height>16</height>
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         <widget class="QToolButton" name="clean_custom_expr">
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           <font>
            <family>Monospace</family>
            <weight>75</weight>
            <italic>false</italic>
            <bold>true</bold>
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          <property name="text">
           <string notr="true"/>
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          <property name="iconSize">
           <size>
            <width>16</width>
            <height>16</height>
           </size>
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        <item row="0" column="1">
         <widget class="QToolButton" name="clean_point_layer">
          <property name="font">
           <font>
            <family>Monospace</family>
            <weight>75</weight>
            <bold>true</bold>
           </font>
          </property>
          <property name="text">
           <string/>
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          <property name="iconSize">
           <size>
            <width>16</width>
            <height>16</height>
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         </widget>
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       </layout>
      </item>
      <item row="0" column="0">
       <widget class="QLabel" name="label_7">
        <property name="text">
         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:12pt; font-weight:600;&quot;&gt;Stewart potentials&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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    <widget class="QWidget" name="layoutWidget">
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     <layout class="QGridLayout" name="gridLayout_3">
      <item row="2" column="0">
       <widget class="QLabel" name="label_38">
        <property name="text">
         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Break values (opt.)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
        </property>
       </widget>
      </item>
      <item row="1" column="0">
       <widget class="QLabel" name="label_3">
        <property name="enabled">
         <bool>true</bool>
        </property>
        <property name="text">
         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Mask layer (optionnal)&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
        </property>
       </widget>
      </item>
      <item row="0" column="0">
       <widget class="QLabel" name="label_25">
        <property name="text">
         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;Number of class&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
        </property>
       </widget>
      </item>
      <item row="0" column="3">
       <widget class="QSpinBox" name="StewartspinBox_class">
        <property name="minimum">
         <number>3</number>
        </property>
        <property name="maximum">
         <number>25</number>
        </property>
        <property name="value">
         <number>7</number>
        </property>
       </widget>
      </item>
      <item row="0" column="2">
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
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        <property name="sizeType">
         <enum>QSizePolicy::Preferred</enum>
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        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
      <item row="1" column="2" colspan="2">
       <widget class="QgsMapLayerComboBox" name="StewartComboBox_mask">
        <property name="enabled">
         <bool>true</bool>
        </property>
        <property name="currentIndex">
         <number>-1</number>
        </property>
        <property name="filters">
         <set>QgsMapLayerProxyModel::PolygonLayer</set>
        </property>
       </widget>
      </item>
      <item row="1" column="1">
       <widget class="QToolButton" name="clean_mask_layer">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="font">
         <font>
          <family>Monospace</family>
          <weight>75</weight>
          <italic>false</italic>
          <bold>true</bold>
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        </property>
        <property name="text">
         <string notr="true"/>
        </property>
        <property name="checkable">
         <bool>false</bool>
        </property>
        <property name="autoRepeat">
         <bool>false</bool>
        </property>
        <property name="autoExclusive">
         <bool>false</bool>
        </property>
       </widget>
      </item>
      <item row="2" column="2" colspan="2">
       <widget class="QTextEdit" name="StewarttextEdit_breaks">
        <property name="maximumSize">
         <size>
          <width>16777215</width>
          <height>98</height>
         </size>
        </property>
        <property name="tabChangesFocus">
         <bool>false</bool>
        </property>
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     </layout>
    </widget>
    <widget class="QWidget" name="layoutWidget">
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       <x>18</x>
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       <height>41</height>
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     </property>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="StewartpushButton_clear">
        <property name="minimumSize">
         <size>
          <width>120</width>
          <height>23</height>
         </size>
        </property>
        <property name="maximumSize">
         <size>
          <width>200</width>
          <height>23</height>
         </size>
        </property>
        <property name="font">
         <font>
          <italic>true</italic>
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        </property>
        <property name="text">
         <string>Reset field values</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QDialogButtonBox" name="button_box">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="standardButtons">
         <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
        </property>
       </widget>
      </item>
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   <widget class="QWidget" name="tab_2">
    <attribute name="title">
     <string>About and references</string>
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     <property name="html">
      <string>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
p, li { white-space: pre-wrap; }
&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Ubuntu'; font-size:11pt; font-weight:400; font-style:normal;&quot;&gt;
&lt;p align=&quot;center&quot; style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Usage&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Point layer&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; The set of known observations to estimate the potentials from.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Field name&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; Name of the variable from &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;Point layer&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; from which potentials are computed (quantitative variable without negative values). If no one is selected, 1 is used for each observation of &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;Point layer&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Mask layer&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; (&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;optional&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;) The spatial extent of this object is used to create the regularly spaced grid of point and the output will be cropped by it shape.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Spatial interaction function&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; The spatial interaction function to use. Options are &amp;quot;&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;pareto&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;&amp;quot; (means power law) or &amp;quot;&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;exponential&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;&amp;quot;. If &amp;quot;&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;pareto&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;&amp;quot; the interaction is defined as: &lt;/span&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:9pt; font-weight:600;&quot;&gt;(1 + alpha * mDistance) ^ (-beta)&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;. If &amp;quot;&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;exponential&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;&amp;quot; the interaction is defined as: &lt;/span&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:9pt; font-weight:600;&quot;&gt;exp(- alpha * mDistance ^ beta)&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;. The alpha parameter is computed from parameters given by the user (&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;beta&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; and &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;span&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;).&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Resolution&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; Resolution (&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;in map units&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;) of the regular grid the create (and resolution of the output raster for Reilly and Huff algorithms - overriden by the &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;Location of unknown points&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; if provided for stewart's potentials).&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Span&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; Distance (in map unit, or in the unit of the &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;Distance matrix&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; if provided) where the density of probability of the spatial interaction function equals 0.5.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Beta&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; Impedance factor for the spatial interaction function.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Number of classes&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; Number of classes for the polygon shapefile to create.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic; color:#d1d1d1;&quot;&gt;Location of unknown points&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; color:#d1d1d1;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt; color:#d1d1d1;&quot;&gt; The set of unknown points for which the function computes the estimates. Using an unknown points layer will override the &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic; color:#d1d1d1;&quot;&gt;Resolution&lt;/span&gt;&lt;span style=&quot; font-size:9pt; color:#d1d1d1;&quot;&gt; parameter.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic;&quot;&gt;Custom expression&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; An expression to compute and combine potentials on many variables. Only name of numeric fields and basic operators (&lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-weight:600;&quot;&gt;*&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;, &lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-weight:600;&quot;&gt;+&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;, &lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-weight:600;&quot;&gt;/&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; and &lt;/span&gt;&lt;span style=&quot; font-size:10pt; font-weight:600;&quot;&gt;-&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;) are allowed (so the expression should be looking like &lt;/span&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt; font-weight:600;&quot;&gt;&amp;quot;gdppps2008&amp;quot; / &amp;quot;pop2008&amp;quot;&lt;/span&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt;&quot;&gt;)&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;. Using a custom expression will override the &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic;&quot;&gt;Field name&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; parameter.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; font-style:italic; color:#d1d1d1;&quot;&gt;Distance matrix&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600; color:#d1d1d1;&quot;&gt; :&lt;/span&gt;&lt;span style=&quot; font-size:9pt; color:#d1d1d1;&quot;&gt; A distance matrix between the provided points of the layer given in &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic; color:#d1d1d1;&quot;&gt;Point layer&lt;/span&gt;&lt;span style=&quot; font-size:9pt; color:#d1d1d1;&quot;&gt; and in &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-style:italic; color:#d1d1d1;&quot;&gt;Location of unknown points&lt;/span&gt;&lt;span style=&quot; font-size:9pt; color:#d1d1d1;&quot;&gt; fields.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;br /&gt;&lt;/p&gt;
&lt;p align=&quot;center&quot; style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;References&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt; color:#000000;&quot;&gt;- COMMENGES H., GIRAUD T. (2015) &lt;/span&gt;&lt;a href=&quot;https://cran.r-project.org/web/packages/SpatialPosition/vignettes/SpatialPosition.html&quot;&gt;&lt;span style=&quot; font-family:'MS Shell Dlg 2'; font-size:8pt; text-decoration: underline; color:#0000ff;&quot;&gt;Introduction to the SpatialPosition package&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt; color:#000000;&quot;&gt;- HUFF D. (1964) Defining and Estimating a Trading Area. Journal of Marketing, 28: 34-38.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt; color:#000000;&quot;&gt;- REILLY, W. J. (1931) The law of retail gravitation, W. J. Reilly, New York.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'sans-serif'; font-size:8pt; color:#000000;&quot;&gt;- STEWART J.Q. (1942) &amp;quot;Measure of the influence of a population at a distance&amp;quot;, Sociometry, 5(1): 63-71.&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:7px; margin-bottom:7px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'sans-serif'; font-size:8pt; color:#000000;&quot;&gt;&lt;br /&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;Partial python port of &amp;quot;&lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt;SpatialPosition&lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;&amp;quot; &lt;/span&gt;&lt;span style=&quot; font-size:9pt; font-weight:600;&quot;&gt;R package &lt;/span&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;(with the gracious consent of&lt;br/&gt;the authors H. Commenges &amp;amp; T. Giraud)&lt;br/&gt;&lt;br/&gt;-&amp;gt; Original documentation and source code are available on the &lt;/span&gt;&lt;a href=&quot;https://cran.r-project.org/package=SpatialPosition&quot;&gt;&lt;span style=&quot; font-size:9pt; text-decoration: underline; color:#0000ff;&quot;&gt;CRAN&lt;/span&gt;&lt;/a&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; or on &lt;/span&gt;&lt;a href=&quot;https://github.com/Groupe-ElementR/SpatialPosition&quot;&gt;&lt;span style=&quot; font-size:9pt; text-decoration: underline; color:#0000ff;&quot;&gt;GitHub&lt;/span&gt;&lt;/a&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;.&lt;br/&gt;-&amp;gt; R vignettes explaining the main concepts and showing usecases:&lt;br/&gt;&lt;/span&gt;&lt;a href=&quot;https://cran.r-project.org/web/packages/SpatialPosition/vignettes/SpatialPosition.html&quot;&gt;&lt;span style=&quot; font-size:9pt; text-decoration: underline; color:#0000ff;&quot;&gt;Introduction to the SpatialPosition package&lt;/span&gt;&lt;/a&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt; &amp;amp; &lt;/span&gt;&lt;a href=&quot;https://cran.r-project.org/web/packages/SpatialPosition/vignettes/StewartExample.html&quot;&gt;&lt;span style=&quot; font-size:9pt; text-decoration: underline; color:#0000ff;&quot;&gt;Stewart Potential : a Use Case&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:9pt;&quot;&gt;Plugin authors : M. Viry &amp;amp; T. Giraud&lt;br/&gt;&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
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