Digitize your first fields

From Wikiagro.com

 

This exercise is included in the tutorial: Getting Started with GeoAgro GIS

You can use GeoAgro GIS to generate your own maps. Learn how to add new fields to your map, and how to customize the way they're shown.

Contents 1 Setup a Sample Project 2 Digitize fields 3 Divide fields 4 Label your fields 5 Displaying your field labels 6 Related articles

Setup a Sample Project

To go through this learning guide, you need to setup the sample project described in this guide: Create a Project and add initial data

 

Start GeoAgro GIS by double clicking on its icon at your desktop;
You may also run it by using the Windows® Start menu.
The Project Selection window will pop up. Select the "Sample Farm MO" in the learning guide Create a Project and add sample data

Digitize fields

To digitize a field, you must use a layer capable of providing you reference, such as aerial imagery or GPS points. In this exercise, we will use sample imagery from the NAIP. First, make sure it's turned on.

Now we can begin digitizing. First, turn on and select the "Fields - Producer" layer. This is the layer we will use to digitize fields.

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Then, open the "Edit layer's object" menu and select the "Add a new object" tool.

To begin digitizing, click on each of the corners of the fields.

Once you're done, double click to finish drawing.

If you also digitize the field on the right side, you will end up with a map like the one below.

Divide fields

Sometimes you may need to divide an existing field in two or more. You may do this by using the "Divide Objects (Line)" tool

Select the field you'd like to divide using the selection  tools. Then click on the Edit Toolbar  and go to the Divide Objects (Line) tool

Click outside the field and then draw a line to divide the field. To finalize, continue the line outside the field, and double click.


Your field is now divided in two

Label your fields

To identify your fields you may need to label them in some way. GeoAgro GIS provides with this by allowing you to fill your feature with attributes. First, select the fields you'd like to label

Then, go to the menu on the right side and open the "Edit selected object's data" tool.

Now you may start filling your attributes. These attributes will be used later for labeling them. For this excercise, we will add the field names, and its crops.

Field names are stored in the attribute "Field_Name". In this example, field names are 1, 2 and 3; and can be completed as shown below:

Then, crops will be stored in the attribute "Crops". In this example, fields number 1 and 2 are dedicated to corn, while field number 3 is for soybeans. This can be completed as shown below:

Displaying your field labels

You have now completed filling the attributes you need to label your fields. To display those labels, you need to modify the symbology for the layer. Open the "Edit cartography and layer properties" tool.

Now open the "Symbology" tab.

We will use the "Label" box. Open the "Attributes" drop-down menu, and select the "Field_name" and "Crop" attributes, to label your fields with the Field name and crop name you added in the previous step. Click on "Accept" to complete"

You will now see how the features in the map are labeled with the field names and their corresponding crops

Related articles

• Add New Object
• Divide Objects
• Edit selected object data
• Symbology Tab
  

This exercise is included in the tutorial: Getting Started with GeoAgro GIS