Questions tagged [references]

When seeking information about specific (not lists of) books, papers, presentations, tutorials, videos of lectures, and other materials

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2 votes
1 answer
62 views

Finding SRIDs of UTM quadrants or define other quadrants that are not at Equator

Trying to find the SRID of each official-updated ("SIRGAS 2000" or WGS84) UTM quadrant of Brazil. I am supposing that Latitude bands can use precise local projections, so on different SRID ...
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0 votes
1 answer
38 views

Split Polygon in one layer based on boundaries in second layer

I have two different polygon layers, 1 and 2. Now i want to split polygons in layer 1 taking reference from polygons in layer 2. Is it possible in qgis???? Please find attached image as reference ...
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0 votes
0 answers
13 views

Making roads and labels appear or disappear based on scale using QGIS [duplicate]

On most maps, labels disappear the further one zooms out. For instance, on a local scale one can see labels for local roads and small towns, but on a national scale one can only see highways and major ...
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54 views

Methods for GEE ImageCollection

Is there a list, or other documentation and resources, with functions that I can put in front of any variable in Google Earth Engine? I'm not talking about functions that come after 'ee.' but ...
4 votes
1 answer
205 views

Difference between control point, reference point, and tie point

I georeferenced a map using grid coordinate and road network shapefile (e.g. intersection vertex) as a control point. I didn't acquire a control point through the survey. so I use "control point (...
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0 votes
0 answers
37 views

Meaning of Jeffreys-Matusita Separation values

I've computed the JM separation values for my training classes for Sentinel-2 image classification. I understand that the values range between 0-2. Most of the values are above 1.9, but some are down ...
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2 votes
2 answers
251 views

Where is QGIS Desktop data stored?

I've asked for our IT department to install QGIS Desktop on a new laptop. They asked me to confirm whether data for the app is stored in the UK. As far as I can tell the data is simply stored locally. ...
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1 vote
1 answer
79 views

Gdalserver purpose and function

What does gdalserver do and how does it work? I can't seem to find the documentation explaining how to use it.
2 votes
1 answer
73 views

Learning how to use QGIS Expressions [closed]

What is the best way to learn about expressions in QGIS? Do you have any book recommendation?
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0 votes
0 answers
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Reference for Google Earth Engine Map Screenshot

I would like to use a screenshot of a Landsat Image in GEE in an university paper. I read the Terms of Use but still don't really know how to put the references correctly. When the image is displayed, ...
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0 votes
1 answer
53 views

PDF or HTML versions of Spatial Query Lab (FOSS4G Academy) lectures by Rick Smith

I am Spatial Science Teacher at TAFE NSW teaching Spatial Information Systems online. In 2019 our department started including links to many of the Spatial Query Lab SQL lectures in our resources. We ...
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-1 votes
1 answer
226 views

Seeking ArcGIS Pro cheat sheet

Is there a cheat sheet that helps me remember where settings are hidden in ArcGIS Pro? I am looking for a poster that I can hang next to my monitor.
-1 votes
1 answer
149 views

Difference between Linear Hydrography and Area Hydrography

I am looking at the U.S. Census data and downloading the linear hydrography and area hydrography datasets to add to my first GIS map (I'm a new student). I am self-teaching GIS, and after a multitude ...
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0 votes
1 answer
47 views

Seeking Detection Tutorial for Google Earth Engine [closed]

Does anyone know a good tutorial to learn how to detect objects using Google Earth Engine? My goal is to find a smart way to detect objects (these objects are plantations in Ivory Coast) using Landsat ...
0 votes
0 answers
55 views

How to learn GIS? [duplicate]

Could someone guide me where to study all about GIS and pursue it as a profession without going to college? I am seeking links.
0 votes
0 answers
36 views

How to use QGIS Python API? [duplicate]

I am new to Python and QGIS, and I want to automate a process so I want to learn how to use the QGIS Pyhton API to make our own code and do the job. If anyone knows any tutorial about this then please ...
2 votes
0 answers
871 views

Citing/attributing Google basemap in QGIS for research paper [closed]

I have searched Google for how to cite a Google base map in QGIS for a research paper and I cannot find the correct website for their rules for attribution. Can somebody quickly link me to their ...
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0 votes
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2k views

Getting started with SharpMap in Visual Studio with C#

I am trying to use SharpMap in Visual Studio with C#. My first step was to go to the Tutorials on CodePlex. https://archive.codeplex.com/wikipage?title=SharpMap%20Tutorial&referringTitle=Home But ...
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-1 votes
1 answer
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Converting Long Lat from Address in OpenLayers

I want to convert Long Lat from Address using OpenLayers. For example: Address: London => Lat: 51.507351 , Long: 0.127758 I can't document tutorial.
-1 votes
1 answer
272 views

Looking for 3D Data Visualization Tutorial in QGIS 3.10

I want to extrude polygons based on a attribute value, and then view this with 3D Map View. I have been struggling for days and are not getting anywhere. I am using QGIS 3.10.4. Can someone please ...
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0 votes
0 answers
56 views

Looking for CRS/Projection Services

As a part of my university project I am developing a web service that provides information about coordinate reference systems that were created in USSR. It will show its Proj.4 and WKT definitions, ...
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5 votes
1 answer
466 views

Parallel processing in QGIS3 on Windows system

I am working on a big vector data set with more than 2.4 million features containing 10x10m squares. I wrote a small script in Python to delete uninteresting fields and perform calculations on the ...
3 votes
1 answer
377 views

Seeking tutorial to split group of layers in QGIS

I am trying to split a group of layers, but I can't find anything online about it. I have a layer with a paper clip on it (in the sidebar). I can't figure out how to break it. Could you link me to a ...
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2 votes
1 answer
449 views

Converting ArcSDE point data from image to MSSQL geometry

I have a bunch of points in an SDE table which is currently stored in an MSSQL database. The full entry is below, while the data i'm trying to convert from binary to geometry is: ...
0 votes
0 answers
300 views

Wrong coordinate

I'm working on Sudan I opened a Google map layer from the quick map services I don't know how to set the project coordinate system to get to correct longitude and latitude Should the project have a ...
1 vote
0 answers
32 views

Satellite moving target tracking simulation

I am trying to create a Simulation of an earth-pointing satellite. The satellite should track a moving target on the ground via an on-board camera. How can I calculate the goal attitude of the ...
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3 votes
1 answer
1k views

Converting Model in Plug-in in QGIS

Recently, I started making a model on QGIS and now I want to transform it into a plug-in, but it seems that I have to change the code to do it, otherwise it won't work. What changes are required to ...
2 votes
1 answer
174 views

Seeking tutorials online explaining how to draw squares (having specific length) in QGIS?

I need to produce in QGIS a square having a specific dimension (1km x 1km). First I created a new polygon layer, but when I start editing through the Advanced editing tool, the program crashes. I ...
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-1 votes
2 answers
1k views

How to make a fictional city map? [closed]

I'm currently making fictional city for my novel project, and I need a tool for making city map. I tried Adobe Illustrator, but it'll be quite hard labeling each streets, parks, buildings etc. I saw ...
1 vote
1 answer
30 views

Where can I find images of the Buttons? [duplicate]

I am trying to write a tutorial for simple QGIS functions. I would like to include a set of buttons, each with an explanation of what its function is. Can anyone tell me where I could find the buttons ...
0 votes
1 answer
72 views

Label or font colors on an imagery background examples

I have been in searching of a website that was done by somebody from ESRI that wrote about...if I remember right...it was in either on the ArcGIS Mapping Center or in the ESRI Technical support ...
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2 votes
1 answer
269 views

What is QGIS private cloud?

I am working on a conservation project involving rare species and we have a lot of sensitive data and about 50 people to whom we need to supply maps to. At least at this stage we can not justify ...
1 vote
1 answer
73 views

Seeking tutorials about GIS workflows in FME? [closed]

I have never used FME for spatial processes before. However, I would like to use it in automating some GIS processes and learn. Are there are any specific tutorials that explain this?
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1 vote
1 answer
1k views

Hosting raster tiles on GeoServer? [closed]

I am new to GIS world. I am trying to host raster images (TIFF) which I need to convert in tiles and host on GeoServer and prepare the service URL so that any user using that service zoom to any ...
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2 votes
0 answers
61 views

Searching styles for indoor maps

I have data that represents Airport floor plans stored in GeoJSON format. Are there any standards, guidance, or good practices for Indoor Maps Styling? Any references or resources would be useful.
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-2 votes
2 answers
68 views

Learning DEM resources? [closed]

I'm starting on a problem where I need to find the high point inside a polygon that exists inside the bounds of a DEM tile. I'm teaching myself GDAL and I'll be using Python to access the GDAL library....
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16 votes
2 answers
591 views

Transferring flows (connections and values) between polygons in QGIS

In QGIS there are two shapefiles representing the moving data between cells and one additional layer, see image below Moving data defined by: A polygon 'LayerA' (transparent squares with red outline)...
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2 votes
1 answer
266 views

Inherited values between polygons in QGIS [duplicate]

In this project, I have three polygons, see the image below 'Polygons_From', includes input attributes, i.g. "Value_1", "Value_2", "Value_3", and $area for each quadrate ...
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1 vote
1 answer
78 views

Citing data on map layout?

I am working on a thematic site map for a scientific study. In addition to my own data that will be displayed on the map, I have included reference data from U.S. federal agencies (e.g. National ...
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1 vote
0 answers
268 views

Understanding proj4, epsg and esri *.prj in depth? [closed]

Where can I find a good resource that teaches me 1) about the difference between proj4, EPSG and ESRI *.prj? (Why do several coordinate system definitions exist? When should I use which? How are they ...
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4 votes
0 answers
102 views

How to read PyQGIS documentation? [closed]

As I get more into QGIS scripting, I refer to the documentation often and usually without success. I have trouble deciphering how to interpret the classes, etc. I've been really struggling to create ...
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0 votes
1 answer
64 views

Learning to use QGIS online? [duplicate]

I want to start using QGIS. I have worked in ArcGIS but I would like to start learning QGIS online. Any suggestions for good online courses (hopefully free or not very expensive)?
0 votes
1 answer
206 views

Seeking MODIS Land Surface Temperature reference? [closed]

Can anyone point me toward an article that converts the LST values on the MODIS LST Image to degrees Celsius? My purpose is find a reference (article, book or theses) for this formula that converts ...
3 votes
4 answers
2k views

Using WinForms with ArcGIS Pro SDK?

I want to port a tool developed in ArcObjects for ArcMaps into ArcGIS Pro using the ArcGIS Pro SDK. The tool's UI was created using WinForms but to recreate the UI in ArcGIS Pro is looks like I would ...
7 votes
1 answer
2k views

Developing QGIS Python plugins using Jupyter?

Is it possible to run PYQGIS commands using Jupyter notebook and, if so, is there any documentation to develop QGIS plugins using Jupyter?
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0 votes
1 answer
237 views

Creating polygon from leased unit metes and bounds calls using ArcMap? [closed]

I have a dataset containing with metes and bounds listing an area. I want to build a layer from these calls and produce the lines (polygons) that show the area. I know there may be a bit of ...
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1 vote
1 answer
79 views

Have you all solve importing Z point from dxf to QGIS? [duplicate]

I have read all the answer about importing dxf to QGIS, but I still not understand yet. Does anyone have a video link (youtube or another) that show me step by step to export dxf with Z point to QGIS?...
1 vote
0 answers
33 views

Recommended Books on Arcpy/Python and GIS [duplicate]

Does anyone have recommendations on books/workbooks that I can read that goes beyond a beginner's level for Arcpy/Python with GIS? I've written several scripts, some simple, some complex, but I want ...
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4 votes
1 answer
7k views

Latitude, longitude, projections, CRS [closed]

I'm confused about the following basic points: Do lat/long points have a projection or are they projection agnostic? Do these points live in a sphere or a plane? I understand that projections are ...
  • 201
8 votes
2 answers
2k views

Why did Esri create .zlas compressed LiDAR files instead of adopting .laz?

I am talking about the Esri Optimized LAS file format for compressed LiDAR files (.zlas). While the uncompressed format (.las) from ASPRS was adopted by practically the entire Remote Sensing and GIS ...
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