GIS/GPS Programming

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The Global Positioning System (GPS) is a space-based global navigation satellite system (GNSS) that provides reliable location and time information in all weather and at all times and anywhere on or near the Earth when and where there is an unobstructed line of sight to four or more GPS satellites. A geographic information system (GIS) or geospatial information system is any system that captures, stores, analyzes, manages, and presents data that are linked to location(s). In the simplest terms, GIS is the merging of cartography, statistical analysis, and database technology.

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Where can I find complete list and definations and all PGN who NMEA 2000 uses ?
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Exploring SharePoint 2016
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Exploring SharePoint 2016

Explore SharePoint 2016, the web-based, collaborative platform that integrates with Microsoft Office to provide intranets, secure document management, and collaboration so you can develop your online and offline capabilities.

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The Point is      x=0.6160      y=0.8308
Determine coefficients of the equation for a second order polynomial in the format:
𝑦=𝑎𝑥2+𝑏𝑥+𝑐
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I browsing ESRI.COM website to try to understand the current GIS solution. I couldn't find where the instruction for ArcSDE (Spatial Data Engine) is.
Is the ArcSDE product being deprecated/retired? or it is just hiding some where?
Thank you!
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Dear All,

I have a device (installed on vehicle) which sends latitude and longitude on the Server through GPS. I have a route of that vehicle which is successfully plotted on Google Map.

My Problem is how can I plot latitude and longitude at runtime on Google Map in PHP dynamically on Desktop Application. I want to plot fetched latest latitude and longitude on Google Map to show where the vehicle is running.
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Google Elevation API
The article's main focus is , to create a C# console application using Google's Elevation API. For more detailed information about this topic, use the attached links.
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GEOCODING / REVERSE GEOCODING
The article's main focus is , to create the application using Google's GeoCoding/Reverse Geocoding. This article will teach you what GeoCoding and Reverse Geocoding is and how to write a simple C# console application. I also added some links, for more detailed information for this topic.
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What FREE Android Phone tracking location AT&T APP do you recommend so I can find where my child is currently at if needed ?

 1. https://mobile-tracker-free.com
 2. etc ?
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How to convert Polyline Z to normal polyline
FV-Superseam.shp
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1 Comment
How can I indicate to my iPhone X that I am walking (and not driving) while I am using the built-in GPS map services to provide me with turn by turn directions?

This is especially important since I visit a lot of towns that have one-way streets.
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6 Comments
Need iPhone app to track my location

I need to sell on the road and sometimes need a reminder which stores I visited. So, a map if where I went each day would be helpful.

What options do I have?

Is there location data already on the phone I can use?

Thanks
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4 Comments
Introduction to R
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Introduction to R

R is considered the predominant language for data scientist and statisticians. Learn how to use R for your own data science projects.

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I have successfully installed tilemill and styled my maps using OSMBRIGHT as the a starting point
I've edited this theme to get it the way i need, it looks great apart from one thing:

I when zoom out to the world, the style is pretty bland (just one colour)
I wanted to use something like google streets on full zoom out level
https://www.google.com/maps/@-19.3740644,-55.8196685,4.18z

or like this
https://cloud.maptiler.com/customize/#streets/0.76/0/120.5

I've found something called natural earth 2 which also looks nice
http://www.shadedrelief.com/natural2/pages/about.html


My question is, how can i style OSM bright at max zoom out levels to look like the above?

I've been looking an it appears i need to apply GlobalLandCover layers like
landcover_treeland
landcover_cropland
landcover_scrubland
landcover_forestland
etc

I'm currently using Raster tiles

This is the base.mss that I was using as my starting point
https://github.com/mapbox/osm-bright/blob/master/osm-bright/base.mss

Can someone give me the code to achieve the above please?
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My Galaxy Note 4 (already updated to latest Android) tends to lose
connectivity to GPS (even though the connection to cellular/mobile
data network seems to be intact) while driving for 3 to 30 secs.

I'm using Waze.  The disconnection can happen even on a bright
sunny day (ie don't have to be cloudy/rainy days) or in open
highway (ie not while going through tunnels).

The same SIM card was previously used on my Galaxy Note 2 for
for almost a whole year previously & I never had this issue.

Is this a known issue with Note 4 or the Telco ?  Maybe one way I
can test this is to use the Note 4 as a hotspot (tethering) to an
iPhone & test to see if Waze/GPS  disconnects intermittently:
map is still there but there's a red alert message that 'connection
to GPS is disconnected' at the top of the screen.

I only noted 2 changes:
1. I switch from Note 2 to Note 4 at around the time I disposed
    the old Honda Airwave to Toyota Sienta hybrid: not sure if
    there's something in Sienta that interferes
2. Note4 tends to get very heated up while Note2 is not that
    hot while Waze is in use: I've since taken out the backcover
    of the Note4 (& used scotch tapes to hold the battery & SIM
    card in place) when in use so that the heat dissipates
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Can I replicate a search using the Google Maps API local search with  an iOS MKLocalSearchRequest() ?  For example, using the Google API, making a map search using the keyword "hostels" works correctly. In iOS using MKLocalSearchRequest(), using a naturalLanguageQuery, I just get hotels. Is there a way to fix this?  Or am i forced to use the Google Maps API within iOS?
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Need SLQ (or other systematic way) to change XCOORD and YCOORD  into the  Latitude and Longitude GIS format.

Sample XCOORD: 2121551
Sample YCOORD: 19744813

Sample Latitude: 29.49252
Sample Longitude: -98.67554

I have  a data set of 500 000 rows and need to have a daily systematic way to have this done in SQL (preferably).
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I have the following c# code(all variables are doubles)

 if (Latitude == lastLocation.Latitude && Longitude == lastLocation.Longitude)
                    {

Open in new window


This just compares exact numbers, what i need to do is Compare latitude and longitude to see if in 10 meters of previous location
This code runs 100 times a second, so i need it to be super fast too

I'm not sure how to achieve this so would appreciate some code help
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5 Comments
Where can I buy gps tracking device who will upload location to server at your own choose.
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6 Comments
Hiding labels on Google Maps / Street View

There is a label in exactly the wrong place and I need to hide it.

Possible?

Thanks
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4 Comments
Plotting Photos on a Map

I have pictures from an iPhone6, iPhone 7 and a Canon PowerShot.

I know the iPhone 7 photos have the geo coding embedded. But I need to verify the Canon Power Shot is working for geo coding.

And if not, I may buy a new camera for myself.

And how do I view a folder of image and plot them all on a map?

Thanks
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Need Free Satellite Photos of New York City

I found Google Earth displays perfectly the images I need to use. But if I used that image in a presentation, I could be sued by Google.

So, I would never do that, clearly.

Are there other ways to get Satellite Photos of New York City which are public domain? Or that have some easy to accept license such as putting a copyright notice at the bottom?

I heard some French company had some which were free?

Can you please give me any Satellite Photos websites I can check their terms??

Thanks.
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2 Comments
Rowby Goren Makes an Impact on Screen and Online
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Rowby Goren Makes an Impact on Screen and Online

Learn about longtime user Rowby Goren and his great contributions to the site. We explore his method for posing questions that are likely to yield a solution, and take a look at how his career transformed from a Hollywood writer to a website entrepreneur.

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Hi I need to find the distance between 2 pin codes. For that i would like to find the center point within each pincode and calculate distance between them. This is for my internship project. So how to find the center point within each pin code?
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Employee Tracking - GPS - I want app to web solution for tracking my sales employee and location with form to be filed when they reach that location.
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3 Comments
There a lots of gps apps, but usually they are more for cars & vehicles.  We are looking for one that can we can find each other within a mall or a department store.  Any EE knows of any good ones?
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4 Comments
Hi,


I need to calculate the Grid value based on lon/lat value of particular point  on map. The attached file display the "test_incident" point , need to calculate that point grid value.


Is there any formulas /algorithms  or any API to calculate the grid value.




Thanks,
Venkat.
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I wanna buy a tablets for sales staff at the company to use Citrix Apps and also to track their track.

1- What are the best brands with best price.
2- These tablets must be easy to monitoring by auditing account staff.
3- Is there a mobile printer that can be connected to the tablets and what are the best types?

Thanks
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4 Comments
I have to process a list of latitude and longitude co-ordinates to see if a device has moved in/out of a geo zone

Previously, the app was single threaded, and we delayed processing this information for a few minutes, then we ordered the list by the dateTime and then checked each item in date order to see if it entered / exited a zone

i.e.
12:00:01 - not in zone
12:00:02 - not in zone
12:00:03 -  in zone
12:00:04 -  in zone
12:00:05 -  in zone
12:00:06 -  in zone
12:00:07 -  in zone
12:00:08 - not in zone
12:00:09 - not in zone

Open in new window


this then saves date to db like
12:00:03 - entered the zone
12:00:08 - exited the zone

Open in new window


We have since made the console app multithreaded and we are now seeing race conditions where the data is processed in the wrong order, and its causing data integrity issues where sometimes exits the zone too early, and then the next record see's its inside the zone, therefore its creating data like this

12:00:06 - entered the zone
12:00:08 - exited the zone

12:00:04 - entered the zone
12:00:09 - exited the zone

Open in new window


the user then thinks the device entered the zone twice, when it was infact just once


Due to the high volume of data we process we need to stick with multithreaded solution
We currently check the next item in the list against the in memory "lastPosition" object

I'm now thinking we need to change the approach where we check 1 record against another, and batch the records to speed up performance …
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1 Comment

GIS/GPS Programming

1K

Solutions

8

Content

i
The collection of articles, videos, and posts on this topic.

2K

Contributors

The Global Positioning System (GPS) is a space-based global navigation satellite system (GNSS) that provides reliable location and time information in all weather and at all times and anywhere on or near the Earth when and where there is an unobstructed line of sight to four or more GPS satellites. A geographic information system (GIS) or geospatial information system is any system that captures, stores, analyzes, manages, and presents data that are linked to location(s). In the simplest terms, GIS is the merging of cartography, statistical analysis, and database technology.

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