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Geographic Information Systems : Recent Questions and Answers (Page 504)

Find answers to your questions about Geographic Information Systems or help others by answering their Geographic Information Systems questions.

GRASS 7.8.3 problem with r.watershed and r.water.outlet

I need to find the basin of a small river and this is what I did:I found the drainage direction with r.watershedI used r.water.outlet to find the basin for the...

Asked on 12/05/2020 by Elena Aragona

1 answer

How to Combine Two Image Overlaying Into One Image in Google Earth Engine?

I have two images of different sizes. I can make them overlay each other using Map.addLayer() for each. But I want to combine them into one image as shown in...

Asked on 12/05/2020 by Waleed93

1 answer

Inserting only subset of columns of shapefile to existing PostGIS table with different column names?

The situationSo I have a shapefile with several columns:id|name_en|name_es|name_de|name_fr|...I also have an existing PostGIS table on my remote server:county_id|county_name|county_name_de|has_rain|...What I want to achieveNow I would like to...

Asked on 12/05/2020 by JoeBe

2 answer

Splitting lines: Options for managing IDs and related records

I have roads in a feature class (Oracle 10.3 geodatabase). Roads are split into separate lines where they intersect. This is...

Asked on 12/05/2020

1 answer

Inputing minimum X, maximum X, minimum Y, and maximum Y to create bounding box feature using ArcPy

How do I create a bounding box of Hawaii.shp using the minimum X, maximum X, minimum Y, and maximum Y and store it in a polygon shapefile?xmin: 372236.642923 xmax:...

Asked on 12/05/2020 by John Cortenbach

1 answer

Different min and max NDVI values with different approaches using Google Earth Engine

I'm trying to calculate the vegetation fraction for land surface temperature calculations of a single Landsat 8 image. I need to find the min and max NDVI of the scene....

Asked on 12/05/2020 by Ayda Aktas

1 answer

Disabling map drag and zoom in OpenLayers 3?

I need to disable all map interactions, like map zoom, drag, scroll zoom, any kind of interaction. Is there some easy way to do it?...

Asked on 12/05/2020 by againstflow

5 answer

Leaflet JS - open popup on button click

New to JavaScript, coming from Python background. Created a custom control and have added buttons inside the _div using a for loop and innerHTML. I want to zoom to and...

Asked on 12/05/2020

2 answer

Get polygons of crop classification from the Land Parcel Information Systems (LPIS)

I'm trying to getdownload polygons of fields with crop type. There is a USA database called cropscape which is very friendly. There is also a European one...

Asked on 12/04/2020 by user88484

1 answer

Trimming road end at the intersection?

I have a road centerline that I have used to create buffers that represent road area. Now I need to fix the intersections. As you can see on the picture,...

Asked on 12/04/2020 by Zoran Petrović

1 answer

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