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--- isoline_layer [2017/11/10 09:09] – external edit 127.0.0.1
+++ isoline_layer [2018/07/29 21:33] (current) – removed enviadmin
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-====== Isoline Layer ======
-The Isoline Layer provides a basic functionality for drawing isolines (contour lines) into the map. The isolines are drawn grid-by-grid, not as continuous lines. Therefore the isoline output cannot compete with other professional contouring software such as SURFER from Golden Software, for example. If you need high quality isolines, we suggest to export the data, produce an isoline image in the external software package and save it as a WINDOWS Metafile. You can load this file onto the metafile layer then. This section shows you how to use the LEONARDO isoline functionality.
-Before you can create isolines, the data to be displayed must be loaded onto the Isoline Layer using the DataNavigator. \\
-To adjust the settings for the Isoline layer, click on the **Isoline Layer**-Tab.
-{{ ::isolinesetup.jpg?nolink |Isoline Settings}}
-  * __**Find the Isoline Layer Minimum and Maximum**__
-Press "**Find Min/Max…**" to search for the minimum and maximum values on the isoline layer. When working with ENVI-met files, data inside of buildings (Special ID=1) are often on their initial value or not defined. You can tell LEONARDO to ignore those grids points when constructing isolines and search for the minimum and maximum value on the Isoline Layer.
-  * __**Select a Reasonable Interval for Drawing the Isolines**__
-For example, if the first line (minimum line) is at 0.00, the next isolines will be 10.00, 20.00, 30.00 and so on until the maximum isoline is plotted.
-  * __**Adjust Isolines close to Buildings**__
-If the option "**ignore grids with special=**" is selected, no isolines will be constructed towards grids with the selected ID (select "1" here for buildings in ENVI-met).
-The following two pictures illustrate this concept: In the upper figure, the "ignore grids" option is not used. LEONARDO tries to build isolines including the undefined (random or initial) values below the buildings. This looks messy, because a lot of isolines are constructed around the undefined data. The figure below shows the same data set but with the "ignore grids" function enabled and ignoring data below specials=1. This looks much better.
-{{ ::isolinesmessy.jpg?nolink |Isolines drawn without ignoring grids with special data}}
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-{{ ::isolinebetter.jpg?nolink |Isolines with ignoring grids with special data = 1 (buildings)}}
-  * __**Select style and color of isolines**__
-The style and the color of the isolines can be selected in various ways.
-{{ ::colorsisolines.jpg?nolink |Line Settings}}
-Isolines are organized in 3 classes: positive, negative and zero isolines. \\
-For each of the 3 types, you can select the **line width**, the **line color** and the **line style**. \\ (Different line styles only work with 1 pt width at the moment). \\
-The last line style is "empty" which means that the lines are not drawn.
-You can also color the isolines depending on their value. Check the option "**Use color settings from Data Layer-Key**" to enable this function. In this case, the settings from the data key (number of classes, number of colors, class values) are used to determinate, in which color the isoline is drawn. Note: Different to the vector layer, where the values on the data layer are used to identify the color of the vector, the isoline layer values will be used here to select the color.
-{{ ::coloredisolines.jpg?nolink |Colored Isolines}}
-  * __**Control the Isoline Text Labels**__
-{{ ::isolinelabelsettings.jpg?nolink |Label Settings}}
-LEONARDO provides a very simple mechanism for labeling the isolines. \\
-Use the "**Show labels at Isolines**" option to show or hide the labels. \\
-The associated "**Label Distance in grids**" is an indicative value how many labels are placed along the isolines. However, as mentioned before, the isolines are drawn grid-by-grid, not as a line object. Therefore LEONARDO cannot exactly determinate when the last label on an isoline was drawn. Low values for label distance will produce many labels, high values will produce few labels. You should test, which value fits your needs and data best.
-"**Unit Name**" is the data unit name written behind the label value, "**Nr of Digits**" tells LEONARDO how many decimal digits should be generated.
-"****Draw Negative Labels Italic****" and "**Use Same Color as Isoline**" controls the font appearance of the labels.
-The "**Restrict Labels**" option is another way to control the design of the map. \\
-Selecting "medium smooth segments" will prevent very curvy isolines of being labelled, "smooth segments" will restrict labels to very smooth isoline sections. Finally "no restriction" will put labels everywhere where they should appear following the label distance value.