/r/gis
A community dedicated to everything GIS (Geographic Information Systems).
/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.
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
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
I got my BS in Geography 7 years ago and now have a MA in Teaching that I just got last spring. After graduating with my Bachelors I went to travel for six months in Asia and then found my way into teaching that way through a volunteer position where I taught English in Vietnam. I am currently a middle school geography teacher in the US.
I've been in the education field since 2019 now but I'm not entirely sure the job is my forever position and I'm looking for other avenues of opportunity. I've seen on here many saying that job prospects are slim right. Is there any way I can even land interviews when I have no formal experience in the field? What may be some good things to add to my resume before I begin the process?
Thanks all!
I have a lot of rasters (that covers a country of the size of UK) and some vectors as outputs from our models. These rasters are small but are in the 10,000s. This is for a month and we would want to run our models every month.
Now we want to serve these on our platform and I currently have the following setup.
Geoserver : Setup on a VM on a cloud provider. The VM has a storage attached to it and the data is uploaded to it (inefficient I know, better to have the data on a cloud bucket and then sync it to the VM) Adding a data store is manual for now using the web UI.
Backend : Django with Postgres. Layer metadata from the Geoserver is added to the DB. This is then used by the front end to get a layer to render.
Front end : Talks to an API endpoint that provides layer metadata and builds a full URL to the Geoserver layer and renders using leaflet.
I need advice on how best I can use the Geoserver. How do I arrive at the compute requirements? What optimisations can I use? (Tried COG but it ended up screwing the raster layers)
We also plan to add spatial analytics which I believe will use a Postgres + postgis on it.
My organization just moved our reverse proxy server into a new WAF from Fortinet. After doing so we encountered an issue where any application using arcade expressions would trigger the WAF and immediately disconnect the app, nothing in the app would populate and we couldn't even hit the rest services.
The reason, that we found so far, is that the arcade code is being converted to a sql statement to query our database and that process gets the traffic flagged as a sql injection.
Is anyone else using a WAF like this or anything similar?
Last year I was hired by a forestry consulting firm that specializes in land appraisals, but one aspect of our business is making property ownership maps to give/sell to clients that show the various private/government property owners around the Pacific Northwest. For the past year I have been fairly removed from this process, but this week I was tasked with migrating all of our projects from the soon to be unsupported ArcMap to ArcPro.
I am a recent graduate with some ArcPro experience but no ArcMap experience whatsoever. All of the map projects were created in ArcMap by an older GIS Analyst/Forester who is now retired but had zero experience with ArcPro. Each map has all of the shapefiles and layers contained in several different .mdb files that, to my understanding, are completely incompatible with ArcPro.
I have access to both ArcMap and ArcPro, as well as all of the map data/shapefiles stored locally, but when I load up the projects in either application, all of the data sources aren't properly referenced, and I would hate to have to manually set the source for dozens of layers for dozens of maps. Is there an easy way to convert these .mdb files to .gdb and reference them to their appropriate layers quickly?
The most ideal situation for me would be to utilize our GoogleDrive Cloud Storage to host these databases so that I could edit and share the project files remotely with coworkers, who could then open the map projects and make edits themselves without needing all of the shapefiles and various raster images stored locally. The problem is, I don't fully understand the significance of converting .mdb to .gdb, much less figuring out how to achieve this cloud storage goal (if it's even possible).
Does anyone have any experience with this who could help, or direct me towards a useful guide? I've tried to read some guides but I still don't really understand the "Create Cloud Storage Connection" feature or how it works when sharing projects between PCs.
At the very least, if my cloud storage goal doesn't pan out, I need to have these projects up and running in ArcPro on my PC by the end of next week, so just some help accomplishing these database conversions would be greatly appreciated!!!
Is it possible to automatically detect river embankments from lidar derived dem. I was thinking maybe with using topographic wetness index or geomorphons ridge detection
I'm hoping to make isochrones in R without using OSRM (or ideally anything that requires using an API).
I have RStudio and all my files on a Windows PC. But I'm without admin rights.
I have downloaded OSM road networks for a region (stored as lines in a shapefile).
I have several polygon shapefiles for my region - all very detailed (to the extent that I don't even need an underlying XYZ tile or anything for everything to be perfectly distinguishable to anyone who'd see this).
I'm hoping to count points (houses) within several separate isochrones (originating as points - specific facilities).
Ideally, I'd be able to do this offline, or at least, without transmitting any of the point data out.
I will be able to count how many points are within any of the resulting isochrone polygons. Just stuck as to how to develop them.
For background, I have BAs is History and Studio Art. My passion is in archives, maps, geology, and archeology. Surveying is of interest, I want to be outdoors and traveling more if possible. Up until last year I owned a graphic design business. Can use Illustrator, Corel, and AutoCAD in my sleep.
Right now I'm in art restoration, but have the opportunity to move to the West Coast, get a masters degree, and hit a big reset button. I've heard that GIS is in the need for those from a design bachground.
My questions are : where should I focus my study? What are good volunteer opportunities in the field to start with? What books or learning programs would you recommend? Should I draw some sample maps to show what I'm capable of? Bonus: if you are in the museum field, what kind of interactive map would you love to have on display?
Hi all, I posted a question several weeks ago about the best ways to delineate very small grassed buffer strip areas. I needed 10 buffer strip sites completed, and for 9/10 I successfully used a LiDAR to create a DEM and produce a map in QGIS. The final site is the smallest one (around 0.02 sq mi), and the same workflow I'd used is not at all able to delineate a watershed with the points I'm selecting in QGIS or ArcGIS.
Suggestions for alternatives besides USGS StreamStats, ModelMyWatershed, or QGIS/ArcGIS? Anyone have any successes with Google Earth Engine for small catchments? Any help welcome :) Thanks
Hello everyone, I got stuck on a tutorial where I was required to use the inspector error to create a feature and merge them so that the white gap turns into the same color, I tried selecting the features but the merge button in grayed out, the white gap is just lines that need to be merged with the nearby polygon
Hi.
I have a WMS server URL and I want to build a proxy server for it so that I can serve corresponding XYZ tiles. I've already coded pretty much everything and it pretty much works.
But I've got one question around resolution. The source WMS is supposed to have a resolution of 1:200. I'm not entirely sure what that means when dealing with screens and pixels. I know in real life 1:200 means 1cm<->200cm. To achieve a comparison with pixels, I'm missing an extra bit of info, some kind of DPI, right? But that DPI wouldn't be my own screen/configuration's DPI because a digital map's scale cannot depend on MY screen?
The WMS can export images up to 4096*4096. It seems like a 4096*4096 image from WMS for the area of an XYZ tile at zoom 17 is close to the max resolution the WMS has (the photo begins to be pixelated; I may be wrong). If I'm not wrong, that would mean that 256*256 at XYZ zoom 21 is the max. So an XYZ tile @ zoom 21 in dimensions 256*256 is the best resolution, so zoom 21 should be my max and I should get 256*256 tiles from the WMS?
Thank y
Hey everyone I have a problem in AGP with putting two different map frames in one layout to show a difference on a time scale... Is it possible to lock one of those map frames in a way, that it would not change when I turn on other layers which I want to present in the second frame? Thanks
Hello all,
I am creating a final semester project for a GIS class. I chose to do a map over global ocean currents, but that idea itself has been done countless times already, and I need to find something to add to it so it sets it apart. Does anyone have any ideas of something I can add or change about it?
My former coworker wants to get some familiarity with GIS in order to map out the local electric network (since apparently my replacement was not hired for their GIS skills despite being a GIS position 😅). So I was hoping to compile some resources to send them, to try and help them out, both on intro level GIS usage, and maybe some utility specific ones too. They have access to an ArcGIS account, but I wanted to see what else is out there beyond Esri's tutorials.
Relatively new to using esri. Some work has been done internally in Excel but i need to use this data to correct values in an enterprise geodatabase feature class column. I know I can import the spreadsheet using the Excel to table tool. Based on a matching unique ID, how do I then update a column in the enterprise db feature class in Arcgis with values from the equivalent column in an excel spreadsheet?
I see suggestions online to use the join field tool then field calculator. I don't really want to add new columns to the feature class then modify the structure again. This feature class is already published for some integration.
Thanks
I just bought a property in the Biella region and looking for maps to start planning some terracing based on something real world. Best I've found is 10m resolution which is nice but is a bit low res for a property dev project. Any suggestions on where I could find something more accurate?
I have a BS in Plant Physiology and work as a Landscape Specialist. Since graduating in 2020, I’ve gained experience in surveying and plant biology fieldwork, working in nonprofit organizations and local government. My degree included computer science, hydrology, and geography courses, which gave me a solid foundation in GIS.
I’m considering earning a certification, associate degree, or second bachelor’s degree to transition into environmental consulting or the natural resources sector. I’m specifically looking for online programs. Does anyone recommend programs or degrees to help me get started in this field?
Hey! So I’m a junior and an intern, and I’m wondering if I don’t get onboarded with my current company, should I do another internship or go for a technician position while still in school?
I am taking a 2nd year university course,which requires a project at the end of the term,i have selected the area suez canal,but i can't figure out what to do with it,which area of suez canal i choose to run supervised or unsupervised classification,which area i can choose to show change in land use and land cover,and also what analysis i might be able to do with this area,we have mostly worked with Landsat data till now,TIA
Bored and sipping an IPA after a good day of GIS. So, I am revisiting a previous post concept.
Are there any cool projects people are working on that they just want to talk about and geek out on?
Just want to discuss anything and everything GIS in a positive light. If you want that, "Well done, that's sick!" I would love hearing what people are passionate about today.
I’m currently a freshman at Winona State University in Minnesota, and am contemplating transferring to a university which has geography and/or GIS program for undergrad. Which are the most reputable schools for these programs? I’m more concerned about quality of education and reputation rather than general location. Any feedback would be greatly appreciated!
I'm working on a very large project and I need town plans for a lot of Morocco (or large scale topo maps where town plans are not available) for much of Morocco, which are available from Morocco's mapping agency (ANCFCC), though unfortunately for a pretty large price.
Does anyone know where I can get this kind of data without paying? I'm beyond broke and a single georeferenced image format town plan costs 500 Moroccan Dirhams, the equivalent of about 50 USD, which means I would end up paying thousands of dollars. Not to mention I am not in Morocco and there is a difference in currency.
I don't care what language the map is in, I would prefer a raster type image or even an online map viewer so that I am not downloading an entire country's worth of shapefiles and having to mess with them all to get what I am interested in.
It's outrageous to me that some of these national government agencies charge you for maps of the country. But at least they even have maps in online format, I have been on some countries' mapping agencies websites and all they have is paper maps for you to buy.
I found a couple places the Moroccan government has of open cartographic data but it is extremely basic things like a shapefile of postal code divisions. If anyone can help me out I will be eternally grateful! And I'm sure you will see me back asking about other countries, because my project is focused over many of them. I just find it hard to believe there is no publicly available data for whole countries!
Hi! I am currently looking to go back to school for my masters and I think I can really excel in GIS. I use it often for my current job as an Archaeologist and I'm pretty interested in pursing it as a career. I just need some advice regarding what direction to take. I would like to pursue more general degree such as Data Science or Analytics with a certification in GIS from my university but I am not sure what would benefit me more in the career. Data Science or Analytics. Any advice would be appreciated.
Hello, I am looking for the codebook to the Natural Earth Railroads data (https://www.naturalearthdata.com/downloads/10m-cultural-vectors/railroads/) so that the "type" variable can be interpreted. In its current form, the data has values such as "1" and "9" for type, but I do not know what these represent. I cannot find a codebook defining these on the website or in the forums, so does anyone here know where it can be found? Thanks!
Maybe this would have been better for actual GIS day to have people show off. But I am building a HUB and it’s just sometimes great to see how they are being implemented on real needs. Bonus points if you use Experience Builders to build them. I haven’t seen a lot of HUBs who work like mine. But can’t share mine because internal corporate. Also it’s just fun to explore.
I have a set of sites that change location year to year, but often the location remains the same throughout multiple years. I’d like each point to only have one label (the most recent year). For example, if Site A had the same location in 2024, 2023, and 2022, the point would have a single label: “Site A 2024”
I’m assuming you can accomplish this with a label expression, but I have no coding knowledge and haven’t been able to find a fix for a similar problem, so if someone has a solution it would be much appreciated!
Hello folks. It's my first time posting on this particular subreddit. I ought to gather insights on how to maneuver the broad GIS fild with the need to incorporate the ever evolving realm of Technology. I've recently graduated from university where I pursued BSc GIS and Remote Sensing. I've been learning data science and machine learning over time. I have interest in agriculture, healthcare and the energy sector. With my unique blend of skills, I want to leverage the power of machine learning in the GIS technology. I will appreciate any leverage points, critiques as well as identification of gaps in this innovation. Thank you.
I have this image its false colour composite map and i need to find the region, idk who else to ask and i cant find it anywhere. Please help
Hey folks
I'm feeling a bit discouraged and could use some advice. Recently had 4 interviews (including 2 for entry-level digitizing positions) but no luck landing any of them. This has got me thinking about pursuing GISP certification to boost my chances.
Here's my background:
Would I qualify for GISP with this background? What could I be missing in my applications/interviews that's holding me back? Any advice on improving my chances in the GIS field would be greatly appreciated.
Thanks for your help!
EDIT: Got the answer. Thank you guys.
ANSWER: you need at least 4 years of GIS experience to qualify for GISP
GIS day Rap from Elijah Neymark with USFS!
Has anyone interviewed for an Esri summer internship and remember the nature of the questions being asked? I have an interview next week and am wondering what kind of stuff to prepare for, if it’s typical HR stuff or there was anything unique. Thank you!