Questions & Help>Questions

How to calculate the length of LineString ( Geo Spatial )

#postgis#geolocation
smahi

smahi

How to calculate the length of LineString ( Geo Spatial )

Hi
How to calculate the length of a LineString without using PostGIS sql functions.

7 comments
#postgis
1 979 7

Most Liked

kanishka

kanishka

You might be able to use sum of haversine distance between the end points of each segment in the string, if the geometry is projected over earth.

1
Post #3

Where Next?

View thread on forum (has 7 responses!)
postgis
geolocation
Home Questions & Help>Questions
#postgis#geolocation
1 980 7
Last post

Popular in Questions Top

Brian
Questions & Help>Questions

Import a module from a file into IEX
What is the proper way to load a module from a file in to IEX? In the python world, doing something like this pretty standard: from ....
#iex
35 32139 16
New
senggen
Questions & Help>Questions

How to fix *Bad argument in call to erlang:'++'(<<"xxx/crash.log">>, ".3") in lager_rotator_default:rotate_logfile/2 line 84*
Erlang/OTP 25 [erts-13.2.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] 15:22:35.803 [error] gen_event {lager_file_backend...
#production#error#log
2 46314 2
New
srinivasu
Questions & Help>Questions

Best Practises for Error handling elixir?
How to handle excepions in elixir? Suppose i have A, B, C ,D, E modules. and each module has get() function. A.get() method will call th...
16 16061 9
New
JorisKok
Questions & Help>Questions

How is it possible to get 2 million websocket connections when you have 65536 available ports?
I have a server on AWS, and was running a load test using artillery. When looking at the Phoenix dashboard I see the Ports going to 100% ...
/phoenix
20 17308 4
New
Jim
Questions & Help>Questions

Help with HTTPoison POST
As a follow up to my earlier question: I have the code compiling and running but not getting a successful login from the rest server. ...
#troubleshooting
15 14640 7
New
Kagamiiiii
Questions & Help>Questions

Get ascii value of a character
Student &amp; New to elixir. Nice language. I want to convert a english character, e.g. “a”, which is stored in a variable, to it’s asci...
#learning-elixir
22 13106 4
New
lk-geimfari
Questions & Help>Questions

The most correct way to read a JSON file
What is most correct way to open, read and parse JSON file with poison? For example if we have example.json file in root of some projec...
23 13679 2
New
makeitrein
Questions & Help>Questions

Extracting numbers from a string
Hey all, just started picking up Elixir last week and am writing a scraper as a learning project. Baby step #1 is extracting the number ...
#code-review#regex#troubleshooting
38 14381 20
New
gonzofish
Questions & Help>Questions

Ecto: how to join three tables?
I’m currently trying to understand how to join three tables using Ecto. All the examples I’ve seen use 2, so maybe I’m just missing somet...
/phoenix#ecto
21 13889 7
New
siddhant3030
Questions & Help>Questions

How can I write a raw sql query?
Hi, I have to write a raw query for one of my project. But till now I have used ecto queries and don’t have much experience writing raw ...
/phoenix#ecto
13 19061 20
New

Other popular topics Top

chrismccord
News>Phoenix News

Phoenix 1.4.0 released!
Phoenix 1.4.0 released Phoenix 1.4 is out! This release ships with exciting new features, most notably with HTTP2 support, improved deve...
/phoenix#phoenix-release
688 30048 115
New
shahryarjb
Questions & Help>Questions

How to convert Date to DateTime which Ecto needs
Hello, I get Persian date from my client and convert it to normal calendar like this: def jalali_string_to_miladi_english_number(persi...
#ecto#datetime
15 14989 5
New
William
Learning Resources>Chat/questions

Resources for building an e-commerce store in Phoenix?
I would like to know that is there any online source for learning Phoenix Framework for building E-Commerce Store? Any advantage on build...
/phoenix#ecommerce
137 23142 64
New
openscript
Questions & Help>Questions

How to set up the Elixir SDK in Intellij IDEA with the intellij-elixir plugin?
Hello! Sorry for this astonishing simple question, but I’m really stuck. I try to set up the intellij-elixir plugin, but I don’t know ho...
17 22671 9
New
ycv005
Questions & Help>Questions

BEAM file compliation error after degrading Erlang version from 22 to 21
I have followed this StackOverflow post to install the specific version of Erlang. And When I am running mix ecto.setup then getting fol...
/phoenix#erlang
33 15699 4
New
jononomo
Questions & Help>Questions

Where / How does the Mix environment variable get set?
I am trying to figure out how Mix knows whether the environment is test, dev, or prod -- where is this set? Thanks.
#mix
31 22791 9
New
polypush135
Questions & Help>Questions

Proper use of Task.async?
As many of you may have realized by now (sorry for all the posts here) I’ve been working on a db problem where I’m trying to aggregate a ...
#task
26 15568 8
New
fayddelight
Questions & Help>Questions

Installing elixir via asdf shows zsh: command not found: iex
I tried installing elixir 1.11.2 erlang 23.3.4 via asdf in my zsh shell. Enabled the versions locally and globally. When I list them ...
#erlang#asdf
44 16425 17
New
lucidguppy
Questions & Help>Questions

How do I read a file and enumerate its lines
I have a super simple question about elixir - how would I take a file like this foo bar baz and output a new file that enumerates th...
#how-to-question
20 15454 3
New
joeerl
Questions & Help>Questions

Upgrading Elixir - how to check versions, delete, and upgrade?
Hello again - after a longish gap I’ve decided I really must dig into Elixir and see what’s been happening here - so I have a few questio...
#upgrade
63 40940 13
New
Back to top

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

WyewWorks

Enabling companies to succeed by building software people love.

Potions

The deployment platform built for Elixir: PaaS ease, VPS control.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

WyewWorks

Enabling companies to succeed by building software people love.

Potions

The deployment platform built for Elixir: PaaS ease, VPS control.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement