Can I use iCMTGIS PRO on my iPad to stakeout to survey points and also develop custom data collection forms?

1. Stakeout to survey points

The GPS – Point Stakeout function in iCMTGIS PRO can take you to the survey points. How close you can get to the survey points depends on the GPS receiver. The built-in GPS of an iPad device has an accuracy of about 10 meters (sometimes better, sometimes worse). If there are markers on your survey points, then you could identify the marked points after you get to its vicinity. Otherwise, you will need a high-precision GPS receiver, such as the EOS Arrow or iSXBlue II GNSS to take you closer to the point position. To pin-point a previously surveyed point, you will need to connect the EOS Arrow 200 or iSXBlue II GNSS to a RTK network in your area.

2. Custom data collection forms

The GPS – Collect function will let you record Attribute values during data collection. You can use the GPS – Feature List function to set up the Features/Attributes/Values for your project. Similar projects can share the same Feature List.

GPS Feature Data Collection

GPS Feature Data Collection

You can set up custom value lists to facilitate data collection. During GPS data collection you can have the app display the Attribute fields. You can enter data manually or select the desired data from the pre-defined list. The collected data can later be presented in Sheet View and edited.

If you are not after entering data while recording GPS positions, but are interested in designing your own report forms for entering data for a certain site, then please consider our Wetland & Stakeout app.

Feature Attribution in iCMTGIS III

“When we start collecting data by Collect button a separate window is displayed to the bottom of the screen, showing our added field names, but when we store a point, there is no data seen in that table, however if we use the table icon at the left top of the iCMT, the data is present there, this may give a bad impact if this is without reason.”

The Attribute fields you’ve added to a Topic are for tagging any Features in the Job file.

The Attribute fields for GPS Data Collection need to be defined in a Feature List, which you can associate with any Job file.

When you do Job – Open Job, you will see the Feature List field. Right now it’s probably showing “NONE”. You could select the built-in Feature List “utilities” (in iCMTGIS III) to work with and collect data for the Features defined in that Feature List.

To make your own Feature List with your own Features and Attributes/Values, please select GPS then select Feature List. Here After you select “New”, you can define the type of Features (Point, Line or Area), the data collection parameters and the Attributes and predefined Values for those Features.

While you collect data using the Feature List, you can select or enter the Attributes for the Feature being recorded. These Attribute/Values will display in Sheet View at the bottom of the screen (if you have activated Sheet View display by tapping the Sheet View icon on the right side at the top.)

I have an iPad Air and I’m considering purchasing a better quality gps antenna to connect. Will this app (Deed Calls & Stakeout) support an external antenna like the bad elf surveyor?

Our iOS apps support external GPS receivers that are compatible with the iPad. The Deed Calls & Stakeout app will get the GPS position data that the Bad Elf Surveyor sends to the iPad.

According to the Bad Elf GPS manufacturer, “The Bad Elf GNSS Surveyor delivers ~1-meter positioning out of the box to the iPad for use in GIS, mapping, agriculture, and survey activities.”

Our iOS apps do not provide differential correction capability.

How to create new point, line and polygon features with associated attribute fields and values?

There are a few ways of adding Points, Lines and Polygon Features to a map job.

1) Digitization

You will first need to create a new Topic layer on which to store the Features. Specify the correct topic type (Point, Line or Area) for the New Topic. Also, Farming GPS GIS, Forester GPS GIS and Utility Data Collection will let you add a Topic from the Feature List associated with the map job.

The Tools menu provides the Add Point manually, Add Line manually and Add Area manually functions. When a Point Topic is active, you can digitize Point Features. When a Line Topic is active, you can digitize Line Features. When an Area Topic is active, you can digitize Area Features.

Use the Edit Topic function to add Attribute fields to the Topic.

After digitizing the Features, you can turn on Sheet View (the right-most icon at the top) and enter the values. Farming GPS GIS, Forester GPS GIS and Utility Data Collection provide the ability to select pre-defined attribute values from within the Sheet View.

2) GPS Data Collection

The iCMTGIS II, iGPSGIS II and Utility Data Collection software apps will let you map points, lines and areas using GPS. When you collect GPS data, you can record the attribute values at the same time.

If you have a Feature List defined and associated with a job, during GPS data collection you can simply select one of the Values instead of having to enter the data by hand. The Feature List function is listed under GPS. It lets you define the Feature Topic Layers, the Attributes and the Values for the Attributes as well as the GPS data collection parameters.

Select Main Menu\Job\Current Job to get to the Job Setup screen. Here is where you can select the Feature List to be associated with the active Job. The iCMTGIS II, iGPSGIS II and Utility Data Collection software provide a Feature List file named “park.fbr” as an example.

The GPS data collection function is provided under GPS. Please see the built-in Help document for the procedure for recording various types of points, lines and areas. This document is available in PDF format upon request.

3) For Point Features, there are also the Traverse method under data collection and the Add Point by Coordinates function that you can use to create new points.

Does the app “Area – Distance” allow a person to walk a perimeter to determine the area of a field?

The Area – Distance app is mainly for digitizing a line or an area on the displayed Apple Map then determining the distance or area, respectively. If you are using an iPhone or an iPad with built-in or external GPS, then you could use the Pick GPS function to drop nodes manually as you walk a perimeter to create the Area Feature.

However, the proper way to map a field using GPS is to use the Data Collection function provided by iGPS GIS II for iPhone, iCMTGIS II for iPad or Utility Data Collection for iPad. Using the Data Collection function, you can specify how often to drop a node (default is once a second) and you can also record one or more descriptions for the Area Feature. The app will do the area delineation for you as you walk the perimeter. If the area is a polygon with straight sides, the app also provides an option to record just the corner points to create the Area Feature.

What is a Feature List?

With GPS/GIS data collection, the primary interest is to log the GPS position and record the information associated with that location, be it a Point position, a Line Feature like a road or a river, or an enclosed Area.

The CMT GPS/GIS data collection software will let you specify the GPS data collection parameters as well as enter the descriptive information for the recorded geographic feature.

This field data entry process can be streamlined by the use of a Feature List.  The Feature List is a database that you can pre-define to contain the listing of the Feature Topics that you wish to map, the data collection parameters for each Feature Topic, as well as the associated Attributes for each Feature Topic.  In addition, you can define the list of your standard descriptions for each Attribute.  

When you use a Feature List with a job on the field data collection program, all you need to do is to select a Feature Topic for which to record data, confirm the data collection parameters, select the desired Attributes/Values then log the position. This minimizes the amount of information you need to manually enter, and ensures accuracy and consistency of the recorded GIS data.

The Feature List can be created on the CMT GPS/GIS  field application, or on a CMT PC mapping software program.