After creating a new project, users will be asked to define the location of the project using the interactive Google map. The interactive map allows the user to define one or more areas of interest (AOI). The area of interest should correlate to fields within the project area. The map is ONLY used for mainland United States. If you would like to simulate using an area outside of mainland United States, follow the instructions for User Input.
When defining the AOI, the underlying weather, soils, and slope information is retrieved from the underlying spatial data.
There are two ways to define your areas of interest: you may manually draw your areas of interest using the zoom features and drawing tools on the interactive map, or you may upload your own shapefle.
If you already have a shapefile that you would like to use as your project area you may upload the shapefile. You will need to upload a file that consists of at least four files with the same name but different extensions (.shp, .shx, .dbf, and .prj). Ensure that the .shp file is the format of an ESRI Shapefile that uses the geographic coordinate system (latitude and longitude). The shapefiles need to be within a .zip folder, and you need to upload that .zip folder.
Choosing a Shapefile: To choose a shapefile, select the button Choose file under the Upload Shapefile as shown in the figure:
Uploading a Shapefile: Once you have located the shapefiles you wish to use, upload the files by clicking the Upload Shapefile button.
Submitting a Shapefile: You need to submit the changes to the map once you have uploaded. Be sure to click the Submit button.
Zoom and draw the AOI
If you do not already have a shapefile you may draw your AOI using the zoom features and drawing tools on the interactive map. Users may draw multiple AOIs. AOIs should represent fields within the project area.
Zoom to your area of interest: There are several ways to zoom in to your area of interest. You may enter an address, enter the lat/long (using the correct format where latitude comes before longitude, north latitude is positive, east longitude is positive), select the state and county from the available pick lists, or manually zoom on the map using the zoom tool.
Draw your Area of Interest (AOI): Once you are zoomed in on your area of interest, click the polygon button at the top center of the map. Next, use your mouse to click the corners of your polygon as shown in the figure below. A field is considered an area of interest in NTT. After drawing the field, a message will pop up telling the user to enter the name of the AOI as shown below. Enter the name of the field and click OK. As the user enters the name, it will replace the default name in the text box for the field as shown in the following figure. From this point the field name entered will refer to the selected location. You may create multiple AOIs/fields for your project. Simply click on the polygon button again and create additional AOIs.
Submitting AOIs: Once you have one or more AOIs, you MUST to click the Submit button. The actual map is a different program that is being run within NTT. By clicking Submit, the drawings are actually submitted to NTT.
Deleting AOIs: To remove an AOI, first select the field that you would like to delete, and then click the Remove AOI button.
Once the user clicks OK, the field location will be highlighted as shown below.