Find answers to your questions about Geographic Information Systems or help others by answering their Geographic Information Systems questions.
In this question I was asking for a aggregate solution to update a attribute (ID) if I change or add an new feature and got a great answer from OGmaps:...
Asked on 08/24/2021
2 answerI have a series of polygons (lakes) in Kansas, Oklahoma and a few in Texas.I created centroids of each lake, which I need for distance measurements. These centroids have...
Asked on 08/24/2021 by gwfami
2 answerI have a big (2GB) landcover shapefile I want to convert to a GeoTIFF file. For this purpose, I am using the gdal.Rasterize() function with the following options:rasterize_options...
Asked on 08/24/2021
2 answerI am trying to export all of my current map series pages into multiple PDFs with the Page Name as the file name. So, "PAGENAME.pdf"... Currently, the code runs, but...
Asked on 08/24/2021
0 answerSo I noticed when I wrote this callhttps://api.openstreetmap.org/api/0.6/map?bbox=-118.652199,34.210391,-118.641990,34.214548&page=0&traffic_signI get a lot of data and some of them are nodes with traffic signs like<node id="6786529269" visible="true" version="1" changeset="74327303" timestamp="2019-09-10T19:50:23Z"...
Asked on 08/24/2021
2 answerI am using QGIS to visualise communal water balances of different years as bar plots (QGIS 3.8). I have a point layer (communal area's centroids) with the balance values as...
Asked on 08/24/2021
1 answerI have a problem.I am digitizing the map and I want to distinguish one group of polygons from the other group.The basic difference between them lies in their...
Asked on 08/24/2021
4 answerI am using pgRouting version 2.6. I am creating a routing topology from a subset of lion data https://www1.nyc.gov/site/planning/data-maps/open-data/dwn-lion.page I have gone through the process of setting...
Asked on 08/24/2021
1 answerI have a polygon layer and want to extract all Polygons with the field "street" = 1. When I use "Select by Expression" I get the following correct result: ...
Asked on 08/23/2021
1 answerThere is a polygon and i want to get the best fitting rectangle.POLYGON((530298.250279478 162222.258455872,530298.231436834 162222.252144356,530291.717023011 162220.760892999,530291.4 162222.2,530307.3 162226.15,530307.78 162226.28,530310.87 162227.09,530311.081382153 162226.14214151,530298.915241086 162222.434365185,530298.586991142 162222.368630039,530298.26998128 162222.261048055,530298.250279478 162222.258455872))I tried using ST_SetSRID(ST_Extent(geom),27700) but...
Asked on 08/23/2021
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