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# 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.

Hi,

I am running a loan business for cars.

I am looking for a GPS software solution that would allow me to monitor each car.   With features that allow me to track the car locations, turn it off, and help me in case to locate the car if the customer does not pay.     Could be web base, monthly payments, safe and secure installations of the device in the car and others features.

Regards,

Joe Echavarria
0
If I do geolocation on the IP of a Squarespace site I get the location of the Squarespace server, which doesn't tell me anything about where the business is located.  So how can I find all the Squarespace websites  for businesses located in a certain area, maybe a zipcode or a county?

Thanks for any ideas.
0
I have a simple equation to calculate the "CL" from the sum of four different grids as:

CL = A + B + C + D

I am attempting to use the mc2d package with R to express uncertainty in the CL results based on uncertainties in each of the input grids.

The uncertainty in each input grid is expressed based on uniform distributions with uncertainty ranges of:

+/- 6 for raster A
+/- 10 for raster B
+/- 12 for raster C
+/- 5 for raster D

I would like to run a Monte Carlo simulation whereby the input grids are summed multiple times (e.g. n = 1000) based on values for each grid cell that are randomly selected from within these uncertainty ranges

The code below fails with:

Error in .calcTest(x[1:5], fun, na.rm, forcefun, forceapply) :
cannot use this function

Any suggested edits?

``````library(raster)
library(rgdal)

# Input grid files
A <- raster(matrix(c(20, 35, 40, 60), nrow=2))
B <- raster(matrix(c(6, 10, 13, 14), nrow=2))
C <- raster(matrix(c(6, 8, 12, 14), nrow=2))
D <- raster(matrix(c(35, 40, 50, 60), nrow=2))

# combine the RasterLayer objects into a RasterStack
s <- stack(A, B, C, D)

# Uncertainty distance for each raster used to establish the
# min/max for the uniform distributions in the function just below
uA <- 6
uB <- 10
uC <- 12
uD <- 5

# Function for generating CL
ndunc(1000)
fun <- function(x) {
# Convert each raster to mcnode object
dA <- mcdata(x[1], type="0")
dB <- mcdata(x[2],
``````
â€¦
0
The  following  code  is  for  gps  gsm  module.The  compiled  hex  code  is  pushed  to  microprocessor.
While  compiling the  below code  we  get  unknown  variable  error  for  following  variables UCZS0, UCZS1

``````//GPS and GSM Based Vehicle tracking system
#define F_CPU 12000000			//12Mhz
#include <avr/io.h>			//Header file for AVR device specific I/O Definitions.
#include <avr/pgmspace.h>		//Header file for incorporating program space string utilities.
#include <util/delay.h>			//Header file for incorporating delay routines.
#include<inttypes.h>

#define USART_BAUDRATE 9600
#define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)

void WaitMs(unsigned int ms);

void usart_init();
unsigned int usart_getch();
void usart_writech(unsigned char data);
void usart_message(unsigned char *var);

unsigned char value,i,lati_value[9],lati_dir, longi_value[10], longi_dir, final_message[30];
unsigned char deg = 0xB0;

int main()
{

DDRC=0x00;
PORTC=0xff;

usart_init();

while(1)
{
a:
value=usart_getch();
if(value=='\$')
{

value=usart_getch();
if(value=='G')
{
value=usart_getch();
if(value=='P')
{
value=usart_getch();
if(value=='G')
{

value=usart_getch();
if(value=='A')
{
value=usart_getch();
if(value==',')
{
value=usart_getch();
while(value!=',')
{
value=usart_getch();
}

for(i=0; i<9; i++)
{

lati_value[i] = usart_getch();

}
value = usart_getch();

lati_dir=usart_getch();

``````
â€¦
0
I got API key from google map. But it does not work and I use localhost. Not sure it is because localhost issue and please some help to test ...
0
Everyone needs to get behind this movement! If you're looking for the popular local eatery here, it's at broken.goats.united.
https://what3words.com/
3
How can I have Google maps show markers for an input list of mailing addresses
0
I have a google visitor map that uses Geo location that has stopped working on the live site but still works @ locallhost

I'm thinking it could be because I don't have  SSL certificate!

Looking at the webhosting website they charge from Â£25.99 per year which seems a bit steep considering I only want it so the google works

My question is do I need a  SSL certificate?
If so do I have to go through the hosting company or can I register for free?
0
Hi

Although I've moved forward I'm  Using the https://www.experts-exchange.com/questions/29053802/Javascript-Binding-data-after-clicking-OpenLayers-2-map.html as a start point I have a couple  of further questions

1 Why isn't the icons / markers blue I've tried using relative path and absolute but the  marker stays the default red
My point is I can't change the marker.

2 how do I ensure only 1 popup box is open at once

``````<!doctype html>
<html>
<title>OpenLayers Click Event Example</title>

<div class="wrapper">
<div class="container">
<h1 >OpenLayers Click Event popup</h1>

</div>
<div class="container">

<div id="mapdiv" style="width: 800px;height: 500px " ></div>
<h2>Custom Data for clicked item</h2>
<pre id="result"></pre>
</div>
<script src="https://openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript">
//Set up a click handler
OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {
defaultHandlerOptions: {
'single': true,
'double': false,
'pixelTolerance': 0,
'stopSingle': false,
'stopDouble': false
},

initialize: function(options) {
this.handlerOptions =
``````
â€¦
0
I'm looking for a small GPS tracking device that can be put on devices such as laptops or keychains that can then be tracked to its exact location using a GPS tracking system.

I've already looked at systems such as the Trackr device (https://get-trackr.io/) but this device relies on the Trackr tracking device coming into 100 feet of an iPhone or Android phone that hasthe Trackr app installed on it.

What are some other GPS tracking devices that can truly track the GPS tracking device no matter where it goes?
0
Hi I'm adding points to an Openlayers 2 map by clicking the map and sending the co-ords to a PostGIS database and building html from the response this has additional links ect.

I'm also adding markers to the map from database return (I know it's doesn't work here)

In this recreation how do bind the new data
(The real data is on a closed system without internet access )

``````<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>OpenLayers Click Event Example</title>

<script src="https://openlayers.org/api/OpenLayers.js"></script>
<script src="/jquery-ui-1.9.2.custom/js/jquery-1.8.3.js"></script>
<style type="text/css">
html, body, #mapdiv {
width:100%; height:100%; margin:0;
}

.olImageLoadError { display: none; } /* no pink tiles */
</style>

<script type="text/javascript">

//Set up a click handler
OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {
defaultHandlerOptions: {
'single': true,
'double': false,
'pixelTolerance': 0,
'stopSingle': false,

``````
â€¦
0
Hi
I have some point data stored in a postgreSQL/PostGIS Database
I need to do some distance measurements select point within 0.5 km of my point

something like

``````select * from geo_table where ST_DWithin('POINT(Long Lat)' ::geography,geog,0.5)
``````

the problem is points are stored as Geometry Longitude, Latitude SRD= 4326

my geo_table has geom column created from  Longitude, Latitude points and a currently empty geog column

Any idea how to  create the geography column either from the existing geography column or from the Longitude, Latitude (Stored digitally not DMS ) columns?

thank you
1
Are there any WIndows 10 tablets or laptop with build in GPS receiver ?
0
Hi,

I've got a GeoJSON file of administrative borders i.e. state and county, and a CSV file with 12,500+ named GPS coordinates located within the geographic area.

My boss wants me to use the GeoJSON identify the county for each GPS location so I end up with a CSV file (format) like;
LOCNAME, LOCLONG, LOCLAT, COUNTY, STATE

Is there any tool that can do this?

Thanks a bunch.
0
With AS3 I combined geolocation and accelerometer to direct the iphone, with its back towards a star at the sky. Accelerometer works fine for tilt 0-90 degrees ( directed towards horizon, phone vertical - towards zenith, phone horizontal with screen downwards) but geolocation heading of course flips around 45 degrees tilt and begins to show star direction + 180 degrees. Around 45 degrees tilt geolocation heading becomes very random and I would be very grateful for a suggested algorithm to eliminate the randomness of this phase shift.
_____________
Specifically my problem is:

Geolocation:

then

Ideally above angleSky 45 the code should choose head3=head2 and that should then be a continuation of the heading below 45. But this is not the case. Sometimes the geolocation heading switches at 43 or 44. Thus what I have tried but not succeeded is to store head  at 42 or 43 and then compare head3 with that. If head3 then is more than 100 degrees difference I tried to use the heading at 42-43. But I have not succeeded. Can it be that the aquisition rate, 50 mS is too fast? Or is this attempt to solve the problem not the optimal model?
0
Our company has a KML file that when imported into Google My Maps shows the current coordinates of a fishing boat in the North Atlantic ocean. We then embedded this Google Map into a webpage in an iFrame.

We have a problem in that the position of the ship does not auto-update (refresh) on the webpage. We must constantly re-import the KML file into Google My Maps and obtain new code to paste into our webpage. This is very impractical.

Up until about a year ago Google had a service called : Embed KML gadget. Using this tool you only need import your KML once and resulting webpage is always up-to-date showing current GPS positioning.

It's a longshot but can anyone out there help?

Cheers,
Steve
0
Dear Sir ,

I am working on a GIS Data creation application , I would like to have your need for customization .I want that when user open a ArcMap application It will ask for Login window and user need to put their credentials ,then it allow to go inside the ArcMap ,Where I have ArcGIS Service and after accessing these service user will start to digitize the features in both online and offline mode .

If user created the feature and he doesn't have any internet connection while digitizing the features then data store in local table and once internet connection is there it will automatically store in the central server .

I look forward your kind help

Thanks & Regards.

Laxman
0
I saw a 360 degree camera the other day and thought they might come in handy for me. Maybe I wold use it while I am giving a virtual tour, for example.

What kinds of things are they good for? And bad for?

They seem impossible to edit...

Is it so the viewer can have a "Google Earth" kind of sensation?

Examples?

Thanks.
2
Fitness/tech junkies - the new Garmin 360 camera allows users to create data overlays, including speed, altitude, and distance traveled; it can even calculate stats like hang time and jump height.

https://www.theverge.com/circuitbreaker/2017/5/24/15676894/garmin-virb-360-3d-camera-price-specs
1
I have an iPhone 6 and hope to find an app or combination of tools to I can use to estimate distance and direction of objects (buildings) that are a mile or three away from me.

given the phone knows its location and orientation, might it be used w/ the camera to plot the location of the object I focus in on?

What's the easiest way to do this? I do not need precision, but just a pretty good estimate.

Thanks.
0
Hello Experts,

I am an independent contractor. I make custom reports and maps for police departments. I use Crystal Reports, T-SQL to prepare scripts for handling data, and ESRI for mapping crime, AVL data, CAD data, etc. I have made \$45 per hour since 2008. I want to raise my hourly rate - can you give me some ideas about what people charge for this skill set?

Thank you, Chop
0
I am after some suggestions as to whether it is feasible to know where the mobile phones of our staff are at any particular moment and where they have been in the past so I can replace the expensive rental on GPS trackers in the cars.

BACKGROUND
* I work with a small electrical firm where each vehicle has a GPS tracking system that is soon to run out of rental contract.
* Staff are all equipped with an iPhone and a Galaxy TabA (can be hotspotted to iPhone)
* Office staff need to know where staff are at any particular time in order to efficiently assign urgent jobs
* Office staff also need to occasionally look to see where a vehicle was on a particular day
* I have no idea what an iPhone can do as far as reporting current position or historical tracking but I believe it can do it so some degree
* Using the iPhone for too much tracking can put a real drain on the battery so what are the options?
* The Tab A has GPS functionality but it's communication options are limited to WiFi
* I may be able to use TASKER on the Galaxy tab to log its position at regular intervals and email it to the office when connected to WiFi

Any suggestions would be appreciated
1
I have a problem in GIS coordinates. I have this excel file with unknown CRS

sample data:
source coordinate (EPSG:4994 PRS92)
x: 675282
y: 1217112
- note (the location of this coordinate should point in Ormoc City, Philippines, because i know where this entity is located)

target coordinate (EPSG:4326 WGS 84)
Lon: 124.6051799Â°
Lat:  11.0016664Â°

but when you show it on the map, the coordinates points somewhere near the port area instead of pointing in corner real and burgos streets, Ormoc City, Philippines (should be near this coordinate LON=124.60670952, LAT=11.0056316)

I'm using this https://epsg.io for the transformation. Do you have any formulas that i can write in my excel file to convert it properly? Thanks in advance.
sample-biz-coord.JPG
0
Hi there,

I have built a class library (dll) in visual studio that creates an activeX control object to be used inside another container program (engineering software). I downloaded MapWinGIS, which is an "ActiveX Control and application programmer interface ". The API does most of the heavy lifting and I am able to compile/embed the activeX object inside the container, but I am a little confused about how to deploy this onto other workstations...

I would think its more complicated than simply dragging the project folder over to the workstation. I have done some elementary research on this topic and some people have suggested that I will have to install MapWinGIS onto each workstation at the very least to ensure that all the referenced files are present and then I would have to register the class library itself using either gactutil, regasm /codebase or regsvr32.

I am just not sure, any advice would be greatly appreciated.
Thanks
0
Is there anyway I can hook up a garmin gps I have via USB and have it used for location services on Windows 10?
0

# GIS/GPS Programming

1K

Solutions

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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