How to change the shape of a Line or Area Feature

A number of our iOS apps provide the Move Node function. A couple apps also provide the Insert Node function.

When you use Move Node to move a node of a Line or Area Feature, the shape will be changed. Beware, though, that there is not an undo function for Move Node. If you change your mind, you will need to manually move the node back to its original position or as close to it as possible.

The Insert Node function provides additional flexibility to change the shape of the Line or Area Feature. You can add additional nodes between two existing nodes and move the nodes to approximate the desired shape.

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Can I use Grid & Stakeout on my iPhone to adjust the property boundary?

The Grid & Stakeout app will let you manually digitize points and areas over the built-in Apple Map, but not lines. It will let you create grid points and/or grid lines over an Area Feature.

You can use the Stakeout functions and the GPS on your iPhone to help guide you to each grid point. However, the GPS on your iPhone is not quite accurate. Please read our blog article at: http://wp.me/p1v4kh-tf

When you find the stake at a corner, you could use the Pick GPS function to create a point at that spot. If you are using a Stakeout function to get to the stake location, then you can use the Save Result tool to store the new stake point. Then you could use the Move Node function in the “Snap to Node” mode to move a node on the Area Feature to the new location.

Our iCMTGIS III and iCMTGIS PRO apps will also let you insert new nodes into a Line or Area Feature, thus enabling you to make detailed adjustments to an irregularly shaped property.

Can one add or delete nodes for an Area Feature?

“Is there a way to delete or add nodes to an area? I only see a way to move them. “

If you have PC-GIS , you can copy your job file to your PC then use PC-GIS it to add or delete nodes for a Line or Area Feature. You can enhance the map then print out the finalized map to printer or to PDF file.

As you are working with a simple Area Feature, you could do the following within the Stakeout iCMT app:

1. Create a Point Topic and add the additional points you wish to include as nodes in the Area Feature.
2. Create a new Area Feature, turn on Snap to Node and just tap on those existing nodes and any new nodes (Points) that you wish to include.
3. Delete the old Area Feature.

We are working on iCMTGIS III and plan to release it in 2015. We will try to add the ability to add or remove nodes for a Line or Area Feature. If you have any function enhancement suggestions, please email them to support@cmtinc.com or submit them via a comment to a blog post at this site. Thank you.

Can I use iCMTGIS II to edit a polygon after importing Shapefiles?

Moving a node to a different position

Moving a node to a different position


Yes, you can import Shapefiles into the iCMTGIS II, iGPS GIS II or Utility Data Collection app, edit the position of a Point Feature or the shape of a Line or Area Feature (polygon), then export the changed Features in Shapefile format.

One way to change the position of a Point Feature or a node on a Line or Area Feature is to select the Feature then call up the Feature Properties screen and edit the coordinates of the node.

Another way is to highlight the Feature then use the Mode Node tool to move the selected node to a new position.

You can use any of our apps that provide the Feature Properties or the Move Node function to change the position of a Point Feature or a node on an Area Feature. Some examples are: Area – Distance, Stakeout iCMT, Farming GPS GIS and Forester GPS GIS. These app save data in .pmp format but do not export Shapefiles. Farming GPS GIS and Forester GPS GIS will import Shapefiles and export Feature data in DXF format.

iCMTGIS II for iPad version 1.1.0 update

iCMTGIS II version 1.1.0 is now available for download via iTunes App Store. 

The version 1.1.0 update provides the ability to use the Node Tool to precisely digitize a Point, Line or Area Feature. It will also let you move a previously digitized node to displace a Point Feature or to fine-tune the shape of a Line or Area Feature. Additionally, a Measure Area function has been added.

iGPSGIS II for iPhone version 1.1.0 update

iGPSGIS II version 1.1.0 is now available for download via iTunes App Store.

The version 1.1.0 update provides the ability to use the Node Tool to precisely digitize a Point, Line or Area Feature. It will also let you move a previously digitized node to displace a Point Feature or to fine-tune the shape of a Line or Area Feature. Additionally, a Measure Area function has been added.

Farming GPS GIS app for iPad released

Crop Yield-1H

During the last six months we have released several app tools for using the iPad or iPhone to perform various  tasks on land features, such as measuring and digitizing lines and areas, entering deed calls, creating grid point or grid lines, creating buffers and dividing up an area. Conceivably all of these functions could be useful for farming, farm sales, farm management and farm services. The Farming GPS GIS app fir iPad incorporates these GIS mapping tools plus a number of additional powerful functions. It will let you easily create a farm tract, a timber tract or any other land parcel by importing data in Shapefile or DXF format, by precise digitization or by entering deed calls. The acreage and perimeter will be promptly computed. You can easily divide or combine the farm plots. You will be able to record attribute information for each farm plot as well as for each grid point. You will also be able to enter formulas to compute values derived from the recorded data. For example, when you enter the yield for a farm plot, the yield per acre can be automatically calculated based on the acreage of the plot. Similarly, you could have the app compute and display the cost per acre.

In conjunction with a compatible high-accuracy GPS device, the Point Stakeout function can help you locate an old land mark, and the Line Stakeout function can help you layout a long fence or pipeline.

Detailed Function List:

* Import the shapes from Shapefile or DXF file.

* Precisely digitize Points, Lines and Areas over the built-in Map.

* Create a Line or an Area by entering Deed Calls.

* Move existing nodes to fine-tune the map drawing.

* View position, length and area values for the Features.

* Create multiple attribute tables (Feature Lists).

* Tag the Features with pre-defined Attribute/Values.

* Enter a formula for an Attribute based on other Attributes.

* View or edit Attribute Values in a spread-sheet display.

* Sub-divide an Area by Direction Cut, Hinge Cut or a digitized Split-Line.

* Combine two adjacent Areas into one Area.

* Create buffer zones around a Line or Area Feature.

* Create grid points or grid lines over an Area Feature.

* Label the Features with ID and Attributes.

* Label the Lines with segment lengths and directions as well as corner angles.

* Label the Areas with size in acres and square feet or hectares and square meters.

* Measure distances and areas without saving the shapes.

* Create a Point from the entered address or coordinates.

* Create a Point or record a node by picking the GPS location.

* Use GPS to go to and stake out Points or nodes on a Line or Area Feature.

* Use GPS to stake out a Line or Area boundary.

* Save the job data file for later use.

* Export Features in DXF format.

* Output the drawing and the coordinates to PDF.

* Email the job data files and the PDF files to your colleagues.

Farming GPS GIS fo riPad comes with a detailed built-in help document. It is available for download at the App Store.