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map_suite_desktop_edition_labeling_samples
Table of Contents
Map Suite Desktop Edition Labeling Samples
Labeling based on size
In the sample app “Draw thematic features” of the “How Do I” samples, we show how to use the ClassBreakStyle to display countries based of what population range they belong to. In today’s project, we show some more advanced uses of ClassBreakStyle to show how to label countries based on the area. You will notice that we also take advantage of the various zoom level sets for labeling purposes. The result is an eyed pleasing labeling of the countries with the size proportional to the countries’ area with more labels of smaller countries appearing as you zoom in.
MultiLine Labeling
For labeling purpose, TextStyle has a property called LabelAllPolygonParts that will label all the parts making up a polygon based feature. Unfortunately, we don’t have an equivalent API for labeling all the parts of a line based feature. But thanks to the flexible framework of Map Suite, we show in this Wpf sample how easily you can expand the TextStyle class to allow this labeling capability. Look at the custom class MultiLinetextStyle and how DrawCore function is overridden to have the expected labeling behavior.
Multiple Labels
This sample shows how you can display multiple labels for a given point or feature. You can do this by setting a single TextStyle or multiple TextStyles. If you use a single TextStyle, you can simply use a pattern like “[ColumnName1][ColumnName2]” and when Map Suite displays the text it will combine the values of the columns in your pattern. If you use a different styling method, you will need to manually control the offset of each piece of text to avoid overlapping.
For more information you can see the discussion forum post below:
http://gis.thinkgeo.com/Support/DiscussionForums/tabid/143/aff/21/aft/6955/afv/topic/Default.aspx
Decimal Degrees Formatting
The purpose of this project is to complete the static class DecimalDegreesHelper. This class offers functions to go to and from Decimal Degrees but it lacks the functions handling various formats such as Degrees Decimal Minutes and Degrees Minutes Decimal Seconds. Those formats can be output by different GPS devices and it is handy to know how to manipulate them and convert them to Decimal Degrees, the only format that can be input into a GIS or Mapping application.
Label to Show Location
This project shows how to use layers not for displaying but for getting location information on the current extent of the map. Getting information of the administrative divisions of the current extent of the map is convenient because it gives a spatial clue when the map is zoomed in too close to have any major features recognizable. In this project, we use the WorldMapKit as a background and the shapefiles state and counties are used for displaying the spatial clue.
Labeling Based On Columns
As a developer developing a mapping application, you may encounter point based shapefile for labeling. All the characteristics for labeling such as font, size, angle, color can be found in the attribute information of the shapefile itself. This project will show how to create a custom TextStyle that will get the value for those different columns and display each feature accordingly.
Multi Column Labeling
In this project, we show some techniques to label features based on various columns. With the CustomStyles property and CustomColumnFetch event, you will see the flexibility you have to label the way you desire in a few lines of code. In this example, we label volcanoes based on four columns on two lines and using two different font styles.
map_suite_desktop_edition_labeling_samples.txt · Last modified: 2017/03/17 03:04 by tgwikiupdate