/r/gis

Photograph via snooOG

A community dedicated to everything GIS (Geographic Information Systems).

Welcome

/r/gis is a community dedicated to everything GIS (Geographic Information Systems). Please take a minute to read through the new Wiki page. If you don't find what you need jump in and submit new content.


What is GIS?

A geographic information system or geographical information system (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data. - Wikipedia


Questions? WE HAVE A WIKI, PLEASE USE IT!

Message the r/GIS mod team

Looking for a GIS Job?


Related Subreddits

We are trying to include as much as we can here at /r/gis but there is information spread out in other subs. Here are a few:

/r/gis

105,055 Subscribers

1

Verifying GPS Coordinates fall in certain districts

I have a database of about 200 gps coordinates and need to check if they are part of specific towns, legislative districts. I'll also want to find the AMI and racial charectaristics for the zip codes they fall in.

What is the best tool for this job, QGIS? Some kind of AI?

Thank you!

1 Comment
2024/04/15
18:59 UTC

0

Arcgis desktop

How do I split/cut lines in arcgis desktop map viewer? There is no options that I can see

0 Comments
2024/04/15
18:22 UTC

0

Publically inaccessible data

I am trying to publish this story map I created on AGOL with the points and data I collected in Survey123. I have checked to ensure all the settings are set to everyone (sharing, collecting, viewing, exporting, etc.), but it still shows me this error when I go to publish.

https://preview.redd.it/z2owjudhoouc1.png?width=942&format=png&auto=webp&s=6498a37c9703b2bf2aea34323ff4f31fde272e4d

When I went to the specific layer with the data I collected, it wouldn't let me share it with everyone and gave me this error.

https://preview.redd.it/nbk22ov3pouc1.png?width=648&format=png&auto=webp&s=584716fc14072d8289ab78720bb10f2cf48f1bdd

When anyone outside my specific organization's login tries to look at the story map, the map with this data just shows up blank without any points visible, but the basemap and county boundary lines are still there. If there's anything I can do to fix this, please let me know! I am really proud of my work and would love for all of it to be accessible and such. Thank you!

1 Comment
2024/04/15
18:13 UTC

1

NASA DEVELOP Summer 2024

Has anyone heard back from DEVELOP yet following their interview? It’s been 3 weeks and I’m not sure if I should follow up.

Also how bad is it if I didn’t know what NASA stands for? The rest of my interview felt great otherwise.

1 Comment
2024/04/15
17:42 UTC

1

Studying Geomanagment Software Engenieer possible Job as well?

Hey fellow gis creators,

Im currently studying geomanagment in germany and I'm wondering what jobs I could work in later on. So far all I see in my city is Goverment and construction work.

But I personally want to be able to work in any other Tech section as well, lets say as an Juniour Software Dev or mainly any dev where I would have to code. The environment later is important and I want to work in a good one just in a goverment black/white ich one.

Does anyone has personal experience or know a story from a co-worker?

In short I dont want to be stuck in just GIS I personally find coding amazong its a passion of mine.

More insight: I'm 27 and I married a year ago. In my head I said: as long as I have that 'young never ending energy' I wanted to give studying a try as long as its an opportunity.

Income-wise 3.500€ would be top, I know hard work and good skills are needed for it and I'm willing to learn always

I hope my words were somesort of good to understand, would love to hear some stories and experiences.

1 Comment
2024/04/15
17:26 UTC

1

ArcGIS Pro 3.1 to 3.2 Migration and Compatibility Testing

Hello I wonder if anyone has advise to share on making the leap from ArcGIS Pro 3.1 to 3.2? I work for a firm with about 50 GIS users and we regularly share GIS information with our clients.

I want to minimize the disruptions to our workflow and I'm trying identify known points of incompatibility. I've read both the release notes and 'Whats new' notes and can't find a comprehensive list.

I have the following points of concern so far, I'm wondering if anyone else has items to add or wisdom to share?

  • APRX files must be down saved
  • ModelBuilder files down saved
  • GDB's created in 3.2 cannot be edited in 3.1

0 Comments
2024/04/15
17:05 UTC

1

Historic Floodplain data?

Hello,

As the title says, I'm looking for historical floodplain data ideally from the last 50 years for the area of the chesapeake bay. I haven't had any luck looking at the FEMA products. Does anyone know where I may be able to find some data relating to this?

Thanks

0 Comments
2024/04/15
17:02 UTC

1

What is this error? It always comes up when I'm trying to complete my assignments.

6 Comments
2024/04/15
16:37 UTC

1

Need map suggestions for gis final project(Arc gis online)

Hello, I need just some inspiration on any map ideas for my gis final project. The only parameters are that I need to have around 10 maps by the end of it. Any help would be appreciated!

1 Comment
2024/04/15
14:50 UTC

2

QFields - Ensuring new data can only be located at user's position

Hi there,

I need to create a QFields package for a team of ecologists. Several layers will be point files. I need to ensure that to add a new point in the field, there exists a constraint that the cursor is snapped to the user's position, i.e., the users cannot detach the cursor and place points in locations other than where they are standing.

I found some discussion on github that suggests to add a constrained variable into a field. 'Field_name' <> manual' and check 'enforce constraint'.

Can this be any field for the layer?

Likewise for ' @ position_source_name', I'm not quite sure how to make use of these positioning variables if that is what/can do to solve this.

Many thanks for your time, much appreciated and apologies for potentially newbie questions

0 Comments
2024/04/15
14:34 UTC

1

Asymmetrical road symbolisation in ArcGIS Pro

Hello everyone, I am currently trying to symbolise a street layer. I would like to focus on how many lanes are available in each direction. These are stored in an attribute in the layer. The number of lanes is coded in a numerical code. The first number reflects the number of lanes in the digitisation direction of the polyline, the second number stands for the opposite direction. The entier numerical code is a bit longer, but both values come directly one after the other.

The aim is to display asymmetries. So if there are 2 lanes in the digitisation direction of the polyline, the line should be displayed thicker than in the opposite direction if there is only one lane in that case.

Unfortunately, I have only been able to find a solution within QGIS , but the aim is to achieve this type of display in ArcGIS Pro. In the best case, this type of symbolisation should be easily transferable to other layers or use cases e.g. for the traffic volume in each direction.

Thank you for your help in advance!

3 Comments
2024/04/15
13:29 UTC

1

Geometric Interval

Can someone explain the algorithm that Geometric Interval method uses to create breaks? I didn’t get Esri’s explanation.

3 Comments
2024/04/15
13:28 UTC

1

How to automate Calculating Acreage of polygons without access to attribute rules in ArcGIS Pro

Hello everyone, I am wondering if anyone knows a way to automate calculating geometry (US survey acres) for anytime I make or edit polygons. I know there is way by making an attribute rule but I only have a basic license and cannot create or edit new attribute rules. Is there any way around this? Thanks in advance.

2 Comments
2024/04/15
13:23 UTC

1

How can I add seperate pop-up in arcgis

Hi all, I'm quite a beginner at mapping and really looking forward to your response,thx!

I'm doing story map about Tennessee and want to add a map shows different artists at different counties. (My imagination is that when you click on some highlighted counties, there will be a pop-up showing the biography of the artist from that county.) Also I'm using arcgis mapviewer classic to construct my map.

However, I cannot manage to add pop-up to different counties by using the custom pop-up section (as it seems to be some general pop-up for every counties?) and I asked gpt to produce some code, but arcgis says Unexpected token '?'. and < . So I'm like totally lost, what should I do TvT

https://preview.redd.it/fbgz8lga4muc1.jpg?width=2539&format=pjpg&auto=webp&s=1da7efa00ce3c62eb73ce3485127ba7e6b919c4c

3 Comments
2024/04/15
09:31 UTC

0

Future of GIS

I have recently started a GIS job after finishing College. Obviously with AI becoming more advanced and prevalent, should I be worried about choosing GIS as a career path?

And is there any advice anyone would have in how to future-proof myself for a career in GIS?

14 Comments
2024/04/15
08:48 UTC

21

What is the most common database software/platform used in the industry?

Really pivoting hard to learn SQL. Mostly using Postgres right now, with a little bit of MySQL. What platform is the most commonly used and thus merits the most of my attention and practice?

9 Comments
2024/04/15
07:54 UTC

4

Stepping into the GIS world…

Any advice to someone looking to enter the GIS/geography world?

Studied Geographical analysis and Geography/Environmental Science in undergrad. Completed studies and took some years away.

I love geography and maps, urban development, community, zoning, boundaries, etc…

Anyone work in this field and have some insight on which direction to look for career opportunities. Looking for a foot in the door somewhere with decent job stability to start off.

1 Comment
2024/04/15
06:17 UTC

1

JPG to raster for Maxent

I asked for the lake depth for my Maxent analysis. My supervisor gave me a JPG. I can't get anything else. The data type is raster, format is a JFIF, and compression JPG. The extent and values based on lake depth are gone. There are rgb values and I have the legend. I could georeference the JPG, but then I believe I need to make the image into a raster that carries value to run it in Maxent.

The legend is on the JPG; is there any way to reference the values on the legend (since these also have rgb values) to the values on the map? Or is there a tool that creates values based on rgb values? Like I could define values for combinations of red, blue, and green then have the computer define the rest. I am considering a maximum likelihood classification for this, but I worry for the accuracy of the values.

1 Comment
2024/04/15
04:07 UTC

1

Where can I start in GIS certification?

Hello! I'm a senior planning to graduate with my bachelors in December, hoping to get a job in GIS. I'm looking at the certifications ESRI offers and don't really know where to start. I've taken Fundamentals of GIS for a semester, but that was about a year ago. I'm starting from square one.

On top of that, what other software should I be looking to learn? Any advice would help. Thanks!

4 Comments
2024/04/15
03:54 UTC

1

Statistical Downscaling Model 5.2 Error screening variables

Good day, I am wondering what causes this error, the predictor variables was collected from CMIP6

https://preview.redd.it/siyfh9ivvjuc1.png?width=788&format=png&auto=webp&s=7fee9af623738ef814d47c039668d449bbc2c0e9

1 Comment
2024/04/15
02:01 UTC

1

Help! Clip Multiple Raster tool not working, but there is no error

I am working on an assignment where I am supposed to do a supervised classification using the Semi-Automatic Classification Plug-in and Landsat imagery. I was able to create a band set, but whenever I try to clip the rasters using the Clip Multiple rasters tool under the SPC tab there is no output on the map. The layers show up in the layers panel, but are not visible on the map. I am not using a vector polygon to clip the layers so I know it isn't a problem with the CRS. I am following the instructions of an official tutorial from the SCP website and have watched several of their youtube tutorials, but I can't figure out what I am doing wrong. Does anyone have an idea what the issue could be?

https://preview.redd.it/q8d4huwzjiuc1.png?width=1917&format=png&auto=webp&s=8d2bc9c01c309eca840e284a55cb0f7c6474ce56

0 Comments
2024/04/14
21:31 UTC

2

Describing GIS Experience

So I am finishing up a MA in geography and I am struggling to describe my experience level when talking to employers. My problem isn’t explaining my proficiency in Arc, but explaining AFATDS, which I used for several years in the Army. Does anyone have any experience/ know how to explain what the differences are to an employer?

2 Comments
2024/04/14
20:52 UTC

1

Help - Mann-Kendall test on .tif files in RStudio

Hi, I need help with this test in RStudio, I've never used this program before so apologies if I reference something wrong.

I have downloaded .tif files from GEE on NDVI, and have them all in a folder and linked to RStudio. I'm using the "terra" and "Kendall" packages. I have all the code set up however some of the pixels in the files hold no data and it's messing up the results. Is there anyway to remove pixels with no data from the test?

Thanks :)

1 Comment
2024/04/14
16:49 UTC

1

Why if I spoof the position with GNSS Analysis MATLAB Google code, I get a spike of horizontal speed but it continue to be active while should be constant!

I'm using this GNSS Analysis Matlab Google code: https://github.com/google/gps-measurement-tools/

to analyze the measurements performed via GNSSLogger app.

I was initially in Palermo,Sicily and tried to spoof to Rome. I get this

https://i.stack.imgur.com/OL9ma.png

https://i.stack.imgur.com/ME0Za.png

https://i.stack.imgur.com/6gmK4.png

Horizontal speed when spoofing is activated get a spike, and that's ok since I'm moving from Palermo to Rome, but after that it continues to be activated, oscillating. But why? Shouldn't it come back to 0 since the position "remains" in Rome(?)

0 Comments
2024/04/14
16:47 UTC

11

Ongoing forest fire - Bosnia and Herzegovina

Hello, everyone! Apologies if this isn't what this sub is for, in which case I would appreciate if someone would guide me to the right place.

There's an ongoing fire at around the coordinates 44°09'16.2"N 18°03'01.0"E. I tried looking at satellite imagery to better understand what is going on, but I simply can't find good resources especially since the fire started not that long ago and I've never done any of this stuff before. If someone would like to follow the event and share some findings with me, I'd greatly appreciate it.

Cheers!

9 Comments
2024/04/14
16:43 UTC

18

Beginner Web Map Developer looking for more courses

I am a recent graduate of GIS and urban planning, during my final semester, we began learning how to manually create our web maps.

We used some Esri products, but I would like to focus more on being able to fully code the full site myself. I have a little practice with Mapbox, GitHub, and CodePen.

I have a little bit of experience with Leaflet, Geojson, json, shapefiles and some others.

Are there any recommendations on official courses or individual classes where I can continue my learning?

Thanks!

4 Comments
2024/04/14
16:32 UTC

2

Finding NAIP Imagery for a few counties

I am currently working on a project using NAIP imagery and I'm running into the error where I have the NAIP imagery for the entire United States but only need it for a few counties. ArcPro isn't letting me clip to just that area since the imagery is too large. My question is how/where to find smaller, but same resolution, NAIP imagery or whether this is something that can be troubleshooted.

3 Comments
2024/04/14
15:47 UTC

5

I performed several GNNS measurements in two scenarios: open-sky outdoor, and in my car in the highway. Why does the HDOP results are a little better in car measurement? How can it be possible? What is it due to?

I'm just curious about it.

10 Comments
2024/04/14
14:37 UTC

1

Qgis Raster Sum question

I have a population raster dataset and I want to find the total population within a 20 mile radius around each pixel and have it represented by a raster value. Is this possible? I am concerned the only way to do it is create a vector layer with a polygon for each point and then do a sum within function. Im somewhat new to Q, most of my experience is in Arcpro.

2 Comments
2024/04/14
13:34 UTC

Back To Top