Shapefiles for Chile shows up in North America

“We update de FORESTER GPS GIS II, on iPad from version 1.0.1 to 1.0.2 and we are having issues with the coordinate system when importing a shape file.The shape appears in North América and we are from Chile. We use UTM with Datum WGS84. Is there any suggestion on what can we do. I try this in two different devices with the new version and both have the same problem. When using it in the 1.0.1 version all goes OK.”

Please make sure you have selected the correct UTM Zone.

Please also copy the .prj file for the Shapefiles to the documents folder for Forester GPSGIS II.

What coordinate system do the Shapefiles use? If they are based on WGS 84 LLA, then try setting the Forester GPSGIS II to that coordinate system before importing the Shapefiles. After importing the Shapefiles, then change the coordinate system to UTM WGS84.

Advertisements

Use iPhone app to update attributes in Shapefiles

“I’m just wondering if I could use my I-phone for my surveying? Would iGPSGIS II allow me to import a table in shapefile format, update alphanumeric attributes in the field and then export it back to my PC? From the descriptions of this software it looks like i can only view ()not edit) the attributes of imported files.”

Yes, iGPSGIS II will let you import points/lines/areas with attributes as Shapefiles, update the attributes then export them in Shapefiles.

iCMTGIS PRO for electric pole staking

“So what I’m needing is software that can collect a start and end point for a new line and then take those and tell me where along that line to set my electric poles in order to keep them nice and straight in line with the starting and ending pole. Also it would need to be able to route me say 90 degrees from one point across the road to another pole 65 feet away (for example). Then if I could take these points and load them into Arc GIS as points to snap to, where I could then use my staking application to draw the new lines on the map at these points.”

Yes, iCMTGIS PRO along with the EOS Sub-cm GPS receiver will enable you to achieve what you have in mind.

1. Data Collection

You can use the GPS – Collect function in iCMTGIS PRO to record the start and end points then create the Line Feature.

2. Line Stakeout

The GPS – Line Stakeout function in iCMTGIS PRO will help you stay on the straight line and display your distance from the starting point. This will allow you to set a pole at a specific distance from the staring point. The app also provides a function to let you store the position of the pole. There is a tolerance setting in the Stakeout function that will issue beeps and flash a “Target” message as long as you are within range.

3. Traverse and Point Stakeout

“Also it would need to be able to route me say 90 degrees from one point across the road to another pole 65 feet away (for example).”

The GPS – Collect – Traverse function in iCMTGIS PRO will let you occupy an existing point and create a new point based on distance and angle (bearing or azimuth). Then you can use the GPS – Point Stakeout function to help you get to the new point.

If that “other pole” already exists as an imported point, then you will simply use GPS – Point Stakeout to get to it.

In fact, I would incorporate the point representing that other pole or any other location in the Line Feature mentioned in Step 2 above. In other words, you would create your entire “route” as a single Line Feature (no matter how many bends there are) then use the Line Stakeout function throughout.

4. Digitization

You can draw Points, Lines and Areas within iCMTGIS PRO. You can export these Features to Shapefiles to use in other apps. You can also import Points, Lines and Areas from Shapefiles.

“Would one of your less expensive apps do some of the tasks I talked about in my first email just to try it out?”

The Stakeout iCMT app is very cost effective for performing the point and line stakeout tasks. What it does not provide, among others, are the GPS – Collect function and the GPS – Traverse function. In addition, it gets the GPS position from the Apple CoreLocation, which is not as accurate as the GPS position that iCMTGIS PRO gets directly from the EOS GPS receiver in the “Enable External GPS receiver” mode.

The Stakeout iCMT app will be great to use for a practice run of your stakeout operation or for training your employees.

Stakeout iCMT for trailblazing

“I’m wondering if your software has the capability to allow a user to navigate to a location based on a set of coordinates. . . . The problem is that ArcPad is not designed to allow users to navigate to a set of points and I cant find anything else that will easily allow a user to do this, either. Through internet research, I discovered a reference to your iPhone app Stakeout iCMT. Before I recommend a purchase for this, could you tell me some more about the product? Will it show the tractor driver the location of the next point in our shapefile so that he would see distance and direction to get within 10-15 feet of that point? Please note the driver will NOT have to collect any data in the field he is merely using the program to show him how to drive the tractor in order to create a walking trail (which is NOT a straight line) through dense terrain.”

Stakeout iCMT will allow a user to navigate to a location based on a set of coordinates. It can also help the user to stay on course on a design line.

Stakeout iCMT can be used on an iPhone or an iPad. The iOS devices do not provide good GPS accuracies. You could use an external Bluetooth GPS receiver that is compatible with iPhone or iPad, such as a Bad Elf GPS or a Dual XGPS-150A, which claim 1-3 meters accuracy. There are more accurate GPS receivers available, which cost much more.

Stakeout iCMT is probably the least expensive but really powerful software solution for your task at hand. You can import your Shapefiles then use Stakeout iCMT in one of the following ways:

1. If you want the driver to go from one design point to the next, then create a Line Feature by using Add Line Manually and snapping to the points in the desired order. Then use Line Stakeout to go from one node to the next on the line shape.
You can set the distance tolerance for the app to notify you when you get within that distance from the current target point.

2. You could import the Line shape for the desired path through the woods. Then you would use the Line Stakeout function and let the app help you stay close to the line all the time. The Line Stakeout function will display your distance to the line all the time. And if you set a distance tolerance, then the app can keep on beeping as long as you are within the tolerance distance from the line.

We also have several other apps that incorporate the Stakeout functions along with other functionality.

Off-line GPS data collection

“I would like the ability to collect points, lines, and polygons in the field, offline, with a way to easily download them as shapefiles for use in ArcMap when I return to the office. Will I need to purchase anything else in order to do what I have indicated?”

iCMTGIS II and iGPSGIS II will let you collect points, lines, and polygons in the field, offline, and you can download them as Shapefiles for use in ArcMap when you return to the office.

As far as off-line GPS/GIS data collection and Shapefile import/export goes, iCMTGIS II or iGPSGIS II is all you need.

The questions is whether you need to have a background map displayed as reference while collecting GPS/GIS data.

When you have connection to wi-fi, you can have the standard or satellite Apple Map displayed as background map.

If you have Shapefiles for the region in which you will be collecting data, you can import those into iCMTGIS II or iGPSGIS II as off-line background reference.
If you need to have an off-line geotiff background map displayed during data collection, then you will need to get the PC-GIS 09 mapping software, which will convert geotiff images to the .pim format for use with iCMTGIS II or iGPSGIS II.

Which app will help me layout drain tiles based on Shapefiles?

If you just wish to import Shapefiles and locate the points, lines or areas displayed on your iPhone or iPad with GPS, Stakeout iCMT will help you accomplish the task.

Please also read a few relevant previous blog posts:

1/24/13

3/9/13

11/29/13

Have a Happy New Year!

I need my zone map to display in color

ZONEMAP

Shapefiles don’t store information about how to render the shapes in different colors and fill patterns. Therefore, when you export your zone map in Shapefiles format then import it into Farming GPS GIS, Forester GPS GIS, iCMTGIS II or iGPSGIS II, the default solid green color will be used to represent all Area Features.

If you have PC-GIS, you can classify the grids based on a variable (Attribute) and obtain a color zone map. Then you can save the data in the .pmp job file format to open in Farming GPS GIS, Forester GPS GIS, iCMTGIS II or iGPSGIS II.

PC-GIS will also let you prepare a raster image file for use with iCMTGIS II or iGPSGIS II as a background map.  Currently, Farming GPS GIS and Forester GPS GIS do not provide this capability but can use the built-in wi-fi-dependent Apple Maps as background.