Stake out using iPhone device

“I search application to stakout a polyline with my iphone. I see you make this for ipad but i don’t see for iphone.”

The Stakeout iCMT app can run on iPhone and iPad devices.

If your polyline is stored in a DXF file or as Shapefiles, you can import it into the “Stakeout iCMT” app and let the app help you stake it out.

The accuracy of your work depends on the GPS used. The iPhone GPS is not quite accurate. You can get a compatible external Bluetooth GPS (such as Dual XGPS-150A or Bad Elf GPS) to achieve about 2 – 5 m horizontal position accuracy. High-precision GPS receivers will cost a lot more than these GIS-grade GPS receiver.

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.

App for finding property pins

“I am looking to find two property pins. I have a map of the property lines. What app do I need for a iPhone 5 and will this be very close to the pins? What is the cost for this app?”

What kind of map do you have? Is it a paper map or a file? If it is an image file, what is the file format (such as GeoTiff, GeoJpeg, Shapefiles, etc.)?

Our apps work on iPhone 5. The less expensive ones cost only $9.99. Stakeout iCMT provides the function to help you approach a point (pin) if you know the coordinates (latitude and longitude) of the point. Are you able to match your property map to that displayed in Google Earth? If so, you could probably get the approximate coordinates for the pins from Google Earth then enter those into the Stakeout iCMT app on your iPhone 5. (Use the Locate a Point by Address function described in the attached Help document then store the point.)

If you need additional functionality (such as entering property description from a deed, or mapping the property boundary), then you could consider our other apps, such as iCMTGIS III.

How close you can get to the pin depends on the GPS receiver used. The one built into the iPhone has a precision of about 10 meters or worse. If you just need to find the pin, this will probably be fine. If you need to record the GPS coordinates of the pin that you find, then the location accuracy won’t be that great. Some users use an external GPS receiver like the Dual XGPS-150A or the Bad Elf 2200, which claims 2 – 5 meters accuracy.

iCMTGIS III for Tree Inventory

“I am searching for a mobile GIS app to enable me to do some forest inventory. The property is about 100 acres. I am hoping you can help me determine which is any of your apps will be suitable: iCMGIS II or iCMTGIS III or iCMTGIS Pro. I invested in an Ipad and Bad Elf Pro+ Bluetooth GPS. I considered competing products GIS Pro and iGIS but ran into issues. I need to inventory tree features and collect attribute data by walking 20 meter (60 feet) wide strips on the property.
-the GPS function of the app guide me along lines 20 or 40 meters apart
-Import an image and geo-reference it for use in navigating my transects. I can convert the attached PDF to ..tiff
with adobe acrobat. I cannot afford to buy one of your mobile apps and also your PC-GIS, just to enable geo-referencing, so I hope there is a more affordable solution for that? I have used the app MapTiler to georeferenced the map.
– GIS function of recording the location of features and attribute data.
-ability to customise the data input tables for layer attributes. To name variables eg: tree number, species, diameter, height,
– ideally attach photographs to the records.
-I need to be able to export the GIS data to excel or csv file to
process the data.”

Ideally there would be a forest inventory app for the iPad that works similar to our CMT-Forester 10 (for PC) and CE-CRUISE (for Windows Mobile PDA) software package. These apps will work up the weight or volume based on the timber cruising and the computation method used. However, we have not produced such a timber cruising app for use on the iPad.

As you will be exporting the tree data and do the computation elsewhere, iCMTGIS III may be a viable solution for you.

iCMTGIS III will let you import a Geotiff (geo-referenced .tif) image file for use as an off-line background image. Our PC-GIS X provides the function for geo-referencing a raster image. If you purchase iCMTGIS III from Apple, we can provide the PC-GIS X to you at a discounted price.

iCMTGIS III provides the Point Stakeout function to guide you to a location, and the Line Stakeout function to guide you along lines.

It allows you to take and attach photos to Features.

It will let you export Point Feature data to a text file that you can import into Excel.

It provides GIS functions for recording the location of Features and Attribute data.

It will let you customize the data input tables for layer attributes, and name variables eg: “tree number, species, diameter, height,” As you are collecting tree data for various transects, you will also need to add the Transect_No as an Attribute.

Please keep in mind that the mapping app will treat each tree as a separate Point Feature. In other words, it needs location information for each tree. Here are two ways to associate each tree with a location:

1. Record GPS position data for each tree and record Attribute/Values based on a Feature List. This may be more time-consuming, and you most likely are not interested in the actual location of each and every tree.

2. Define the Attributes for the Tree Topic layer. Roughly digitize a tree by tapping on the Add Point manually icon then tapping on the PickGPS icon. This will add a new record to the Sheet View for that Topic, and you can enter the Attribute information for the tree. Repeat for all trees to be inventoried.

When data for the Tree Topic has been collected, you can export it to a text file for your PC software to process.

How to advance to the next point to stake using iCMTGIS Pro?

“I remember in CMT Field Survey on the PC-5 I could select Next and it would take me to the next point to stake. It doesn’t seem to function
this way in iCMTGIS Pro. In iCMTGIS Pro, there’s a Node field with an arrow, but it doesn’t advance the user to the next point to stake.”

In iCMTGIS PRO and some of our other apps, the Point Stakeout function will let you stake any Point Feature or any node on a Line or Area Feature. For a Line Feature you can enter the Node number in the Node field, or tap the arrow to advance to the next node on the Line or Area Feature.

Therefore, to stake one Point Feature after another, you could first join the Point Features into a Line Feature in the order that you wish to stake them, and then select the Line Feature as the target for the Point Stakeout function. For example, to visit the plots sequentially while cruising a stand of timber, you could join the plot centers into a Line Feature then make use of the Point Stakeout function.

How to mark points in the field

“Could you please give a refresher as how to physically mark points in the field from points on my Ipad using Stakeout iCMT? I have the points saved in the program on my ipad, but I’m not sure how to go to the field, turn on the GPS and walk to my different points on the ipad to lay out field flags.”

Stakeout iCMT provides two stakeout methods when GPS is turned on.

1. You could use Point Stakeout to help you go to each point that you select. Under Stakeout Settings you can set the tolerance distance to have the app alert you when you get close to the position to be staked using Point Stakeout.

2. You could create a Line Feature by connecting all your points into a line in the order that you would like to visit them. Then you would select Line Stakeout, select the Line Feature that you have created, then let the app guide you along the line. When you are at the desired node, you can put in the stake.

If you like, you could tap the Store Result button to store the location of the actual stake point. The accuracy of the stake point depends on the GPS receiver you use.

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.