Very slow to load Features from Shapefiles

A customer reported that it took a long time to load Shapefiles containing county property lines.

The U.S. county property line Shapefiles typically contain more than ten thousand polygons, along with a multitude of Attributes. As we mentioned in our 10/2/19 blog post, it will take time for the app to process a large job with a huge number of Features and Attributes. The app might also crash if a computation or file saving operation is disrupted for some reason.

Typically, you will want to just load the polygons that you need for a particular job, and not all of them. If you have a PC software program that will let you load the county property lines then let you export just the ones that you need, then please use it to prepare the corresponding Shapefiles for importing into the app.

Some of the iCMTGIS PRO customers use our PC-GIS X to accomplish this. PC-GIS X can import and export Shapefiles. So, the users would load the Shapefiles from the county then select the polygons they need to export to a new set of Shapefiles for importing into iCMTGIS PRO. After collecting GPS data, they would copy the .pmp file to their PC and open it in PC-GIS X. Then they will see the Feature data displayed along with the property lines . They will be able to make some changes, if they wish, then use the Plot Preview function to make a nice map for printing to a PDF file or a printer.

If you don’t need to refer to the property lines in the field, then you could simply load the county property polygons into PC-GIS X and combine them with the field data to complete the map.

Displaying iCMTGIS PRO data in PC-GIS X

“I have a project where I collected points using iCMT GIS Pro and EOS arrow. I would like to export the data points to PC GIS X and make a map with a parcel layer in the background and have the features collected shown with the symbol associated to that data point. Can this be done and if so what is the best way to perform this task?”

Yes, you can import the Shapefiles for the land parcels into your GPS Job file after switching the datum, coordinate system and distance unit in your GPS Job file to that used by the Shapefiles. After importing the parcels, you could switch back to the original datum, coordinate system and distance unit.

Shapefiles export does not retain the symbol and color assignment in iCMTGIS PRO. When you import the Shapefiles into PC-GIS X, the Features will be represented by the default symbols. In fact, you don’t need to export the Feature data to Shapefiles if you will be using PC-GIS X to work further with the Features.

iCMTGIS PRO stores your Feature data in a .pmp job file, which retains the symbol assignment. Simply use iTunes to copy the .pmp file to your PC then use PC-GIS X to open the .pmp file.

PC-GIS X can work with .pmp files as well as .fmp files. The .fmp file will store the Features as well as non-spatial map elements, such as a geo-referenced background map (*.tif) or shapes you’ve drawn using the drawing and lettering tools provided in the Palette. After opening a .pmp file in PC-GIS X, you can save the data in the .fmp format.

If you want to send a Job file from your PC to iCMTGIS PRO, please save the .fmp file as a .pmp file then copy it to the iCMTGIS PRO documents folder. A .pmp file only stores Feature data (including symbol assignment) but not the non-spatial data.

Is iCMTGIS PRO app a one-time purchase?

“If we by the app, is it a one time buy? What happens if the account is lost with the employee? Can we transfer to a different iPad?”

The purchase of any of our apps is a one-time software license purchase. You will want to purchase it using your company’s Apple ID. Any iPad or iPhone using the same Apple ID can download the app to use.

Wetland – Stakeout app updated to 1.0.5

.In this release, we have addressed the bug reported by a user for the Rapid Test.
“The formula for the Rapid Test for Hydrophytic Vegetation appears to be incorrect. It seems to be ‘checking’ yes for situations in which the Rapid Test criteria has not been met.”

We have also adjusted the Enter Report Data and Design Report screens for iPAD Air devices (3rd generation and above) and iPad Pro devices with 10.5″ screen.

Websites for some GPS receivers compatible with CMT iOS apps

Our iOS apps can work with any GPS receiver that is compatible with the Apple iPad and iPhone devices.

At the following three websites, you can find GIS-grade GPS receivers that claim 2 – 5 m accuracy:

https://gps.dualav.com/explore-by-product?category=GPS

https://bad-elf.com/pages/products

https://buy.garmin.com/en-US/US/p/645104

The Trimble R1 boasts 50 cm max. precision.

https://geospatial.trimble.com/products-and-solutions/trimble-r1

EOS and Geneq Inc. provide high-precision GNSS receivers.

Many of our customers are using the EOS Arrows series GNSS receivers with our iOS apps. In particular, iCMTGIS PRO can directly interface with the Arrow GNSS to obtain more accurate position data.
https://eos-gnss.com/product/

The SXBlue Platinum GNSS receivers from Geneq Inc. also work well with our iOS apps, and can directly interface with iCMTGIS PRO. Their SXPAD & SXPRO mobile data collectors can run our Windows Mobile 6.5 and WEHH Windows Embedded Handheld 6.5 compatible GPS/GIS data collection software programs.

https://sxbluegps.com/

Does Farming GPS GIS III need wifi or cell service?

“Will this app allow me to plot a lines in my field and then allow me to follow them with a sprayer manually? Does It work without wifi or does it need cell service?”

Farming GPS GIS III provides the functionality for you to digitize Points, Lines and Areas over a displayed map. It also provides the Line Stakeout function to help you stay on the line while spraying.

Our apps do not need cell service.

The Apple Map that the Farming GPS GIS III uses needs wifi to load. You can load it at the office then use it in the field where there is no wifi as long as you do not close the map in the app.

Farming GPS GIS III will let you load a geotiff map (*.tif) to use in the background. Such off-line maps do not need wifi.

The accuracy of your work will depend on the GPS used. Many users get an external GPS receiver to use with their iPad devices. GIS grade GPS receivers claim 2-5 meter accuracy. High-precision GPS receivers are quite costly, but they can get down to sub-meter or cm-level accuracy.

Can I trace an existing Line or Area while digitizing?

Many of our iOS apps provide the function for manually digitizing Point, Line and Area Features. While digitizing a Line or Area Feature, there is a way to incorporate part of an existing Line or Area into the new Feature. Simply tap on the “Include Line/Area Boundary” icon in the digitizing screen then tap on the existing Line/Area. Then, you will be prompted to tap on the starting and ending nodes of the segment to include. The existing Line/Area could be a previously digitized Feature or a line or polygon that you have imported from Shapefiles.