Save the extension file (agvalues.avx) in the EXT32 folder under the ESRI directory: C:\ESRI\AV_GIS30\ARCVIEW\EXT32
Open ArcView and load the Ag Value Extension
Click File > Extensions
Check the box next to the Ag Value Extension to enable the tools and click OK.
This will load the extension. The tools will show up as a dropdown menue when a View window is open.
To begin using the tool, click Ag Value > Load Layers
This will open the following dialog where the user will set the theme information needed to do the Ag Value Assessment.
Load the desired tax parcel shapefile using the folder navigation button on the right.
Choose the field in the shapefile table dropdown list that contains the tax parcel id number.
Then select the field from the table that contains the searchable information needed to locate the parcel. For example, if you want to search for a parcel by the owners name, then you would choose the field that contains the owner names. If you want to search by address, then you would use the field that contains the unique parcel address.
After choosing the search field, type the search item. In this example, I will search for the name Stow . Type the name and click the button to run the search query.
The results will list all exact matches and similar spellings.
Choose the parcel from the dropdown list to be used for the Ag Value Assessment.
Load the DOQ index shapefile. This tool was developed for use with the aerial imagery developed by the NYS Office for Technology. In most counties it will be the most recent 2001-2004 imagery. A polygon index file has been created for each set of imagery. This file must be stored in the same folder as the images. Be sure that the MrSID image extension is turned on if you are using MrSID images.
Load the Soil shapefile and then choose the field from the dropdown list where the soils names are stored. In SSURGO datasets this will be the MUID field.
Choose a name and location for the new shapefile that will be created.
Click OK to run the program.
All of the chosen layers will be added to the view. A new shapefile called Property will be created from the parcel that was chosen. Click Ag Value > Land Use Editor to identify the land use types.
This will open the Land Use Editor dialog.
Click the button to make the new parcel theme editable.
Use the split polygon button to delineate the different land use types. You may have to move the Land Use Editor dialog box around the screen in order to digitize your lines. You can use additional editing tools that are standard with ArcView if you need to. The only other tool that I would recommend using is the Combine Features function in order to work with donut polygons.
When finished splitting the polygon, click the button.
Then click the button to assign land uses to the split polygons.
When you click this button, you will need to click the polygons one at a time and choose a land use type from the dialog below. Make your choice and click OK to save and move on to the next polygon. A label will be attached to each named polygon as you go.
When finished click the button. Be sure each polygon is labeled. If you miss one, you will receive an error message.
Click OK and then make sure all land use polygons are named.
When you are done, click the button and you will get this dialog.
Click and ArcView will intersect the land use polygons with the soil polygons and calculate the acreage of each soil type for each land use type. The acreage and soil type data will be stored in the shapefile attribute table.
The new intersected soil-land use polygon shapefile will be loaded in the view. The theme legend will look something like this, depending on how many land use polygons were created and how many different soil types there were. The attribute table will look like this.
The extension provides a simple map layout function. The user can customize the theme legends and layout as needed. See example below. The legends have been changed to show the land use types over the soil polygons.
Click on Create Layout from the dropdown menu, and you will be prompted for a Layout name. Enter the name and click OK.
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Last Updated 6/16/05