PlanVisit

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{{#customtitle:Plan your field visit|PlanVisit}}

In this learning guide, you will learn to plan your field visit with GeoAgro GIS. You will first locate your plan area and gather information, including downloading available GIS data. This will enable you to study the area and define relevant spots, which you'll be able to upload to your GPS device.

Webcasts

Exercise 01 – Gathering GIS data

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Exercise 02 – Defining spots to visit

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Exercises

Where to Do the Exercises

The first step to complete the exercises in this tutorial is to set up the computer you will be working on. If you completed our Getting Started Course, your system and datasets are ready to go through this learning guide. You will be able to use our GeoAgro GIS trial version for 2 months. From now on, you are ready to begin with any learning guide you wish.

Exercise 01 – Gathering GIS data

In this exercise you will learn to locate your planning area. Then you will learn how to check your available GIS data, and to retrieve additional layers from the internet.

Starting GeoAgro GIS

If the program is closed at the begining of this exercise, please look for the GeoAgro GIS icon at your desktop and run it by double clicking on it.

Image:GIS_gis_Init_03_01.jpg

You can also run it by using the Windows® Start menu.

GGS0-1-1-1-.png

Locate and pan over your planning area

The first step is to locate your planing area in the GeoAgro GIS map. There are several layers you can use to help you, grouped under either “Administrative divisions” or “Base maps”.

Locate and pan over your planning area

Double click on the “Counties” layer to view the whole state.

Locate and pan over your planning area

Click on the “Rectangle zoom tool” and draw a rectangle over the Kennebec county area. GeoAgro GIS will zoom on Kennebec.


Locate and pan over your planning area

Next, you will find Asa Hutchinson Rd. Click on the “Road” layer to select it. Click on “Find objects”. Locate and pan over your planning area

A form will pop up. Fill it as shown below:

Locate and pan over your planning area

Click on “Accept”. An information window counting the number of results found will pop up.

Locate and pan over your planning area

Click on “Accept”. Click on the diagonal cross up left in the “Find objects” window to close it.

Drop down the “Selection” menu and click on the “Zoom to selection” tool. GeoAgro GIS will zoom to the selected feature (Asa-Hutchinson Rd)


Locate and pan over your planning area

Turn on the imagery layers to help you locate the area.


Locate and pan over your planning area


If nothing happens, click on the “Update WMS layers” icon.Locate and pan over your planning area

Manually zoom over the planning area.

Check offline data availability

At this point you will have seen that some layers appear o disappear depending on the zoom. This is predefined to improve performance, but if you are close enough to your planning area (for example, a scale below 1:15000) you will be able to see all of the available layers. To find out whether they're turned on or not, look at the small “eye” icon besides the layer name, in the References panel. If the eye is coloured, the layer is visible; otherwise it's invisible. To make a layer visible, click on the eye icon and tick the checkbox.

Retrieve soil data

We will now download soil data for our planning area. Select the “Soils” layer.

Locate and pan over your planning area

GeoAgro GIS retrieves soils data from the USDA through web feature services or WFS. Click on the “WFS” tool to begin.Locate and pan over your planning area

In the Importing window, click on the star button to see which servers are available.Locate and pan over your planning area Now, select “NRCS Soils NAD84 Geographic”.
Locate and pan over your planning area
The “Layer” dropdown menu shows which layers in the service are available for download. Select “MapUnitPolyExtended”.
Locate and pan over your planning area

In "Unique values field", select "SE_ROW_ID"


Locate and pan over your planning area

Click on “OK” and wait for the download to complete. If the downloading bar does not show any progress, it might be due to the WFS server not responding. Cancel your download and try again. Double click on the “Soils” layer to see the downloaded data.

Locate and pan over your planning area

Download WMS maps

You will now download DRG topography imagery from the USDA WMS servers. Click on “USDA DRG (Topo)” and tick the checkbox.
Locate and pan over your planning area

Click on “Update the WMS servers”. Wait for the data to download.Locate and pan over your planning area

You will see the downloaded imagery for the area.
Locate and pan over your planning area
You will now make it available for you to use it offline. Select the layer and click on the “Save current WMS image” tool.Locate and pan over your planning area Enter the name of the layer. Click on “Accept”.
Locate and pan over your planning area

Make “USDA DRG (Topo)” invisible by unticking the checkbox and make “Offline WMS” visible, again by clicking the checkbox.

Locate and pan over your planning area


Other available WMS layers are:

.5 Foot Imagery Wetlands 1 Foot imagery 1 Foot imagery b 2 Foot Color Imagery USDA NAIP Imagery USGS Imagery USGS DRG (Topo)

Related Articles

Find objects
How to Get Imagery and Topography Data Online

Exercise 02 – Defining spots to visit

In this exercise you will learn to locate relevant spots that you should visit when you go to the field . Then you will learn how to mark them and upload them to your GPS device.

Creating a Vector Layer

The first step is to create a vector layer named GPS points which will contain the spots you selected. Click on the ‘Add New Layer’ button in the Edit menu Create GPS Points Layer.


A dialog box will open. Select ‘Vector Layer’ as shown below and click on ‘Next’.

Create GPS Points Layer

Fill in the form as shown below. Then click on Finish.


Create GPS Points Layer


The new layer should be listed in the References panel under the new Field visit group:


Create GPS Points Layer

Mark your spots

In this exercise, you will mark the two northern corners of the woods you will be working at.

Select the layer you just created (GPS Points)

Mark your spots

Click on the “Edit layer objects” tool to open the Editing menu


Mark your spots

Click on “Add a new object”. Mark your spots

Double click on the northwestern corner to add your first spot


Mark your spots

Proceed the same way to add the northeastern corner. By the end, your map should look like this:


Mark your spots

Import Points to GPS Device

The first step is to assign an identifier to each point in the GPS points layer. Click on the "GPS Points" layer to select and go to the "Selection Tools" menuImage:GIS_gis_Navi_01_01.jpg. Click to drop down the options.

Image:DefiningSpots_11.png

Click on the "Rectangle selection tool" Image:GIS_gis_Navi_01c_01.jpg and draw a rectangle enclosing the points to select them. Then go to the Edit Menu and click on 'Edit Selected Object Data'.Select Objects

A data table will open. Complete the “Point” column with correlative numbers:


Mark your spots

Next, go to the upper left-hand tab and click on GPS. This will display the window for the GPS Module of Geoagro GIS.

GPS Module

Go to the Tools menu and click on the 'Import from GIS Module' button.GPS Module

Select the “GPS Points” layer in the dialog box. Click on Accept.

GPS Module

In the next dialog box, associate the Identifier field of the target layer with the Point field of the source layer. Click on the ""Point" attribute in the right panel, drag and drop in the "Identifier" attribute in the Left panel. Click on Accept.

GPS Module


The points in the “GPS Points” layer have been imported to the map.

GPS Module

Now, physically connect your GPS to your computer the way you're used to, then click on the ‘Connect to GPS Device' button.GPS Module

After connecting to the GPS, click on the ‘Export Objects to GPS Device' button.GPS Module

Thus, the georeferenced points with their corresponding identifiers are stored in the GPS device and ready to be set out on site.

Related Articles

Create vector layer
Add new object
GPS Module
Import from GIS module into GPS module
Upload objects to the GPS device