Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 513

Right table values missing from AddJoin() when Join table order reversed?

Trying to get to the bottom of an unusual behaviour which I am seeing in a join. Background as follows:I have a feature class of centroids which have been located...

Asked on 11/29/2020 by jiraiya

0 answer

Can´t categorize field for unknown reason

I am trying to categorize a field without any success The values should be symbolized from 1-5 and yet, I just...

Asked on 11/29/2020

2 answer

Shape length distance wrong in Robinson projection

I have a world map in the WGS 1984 Geographical Coordinate System. I want to measure the lengths of borders between countries in kilometers. To get the units in meters,...

Asked on 11/29/2020 by JohannaH

2 answer

What is spatial resolution of TROPOMI data in GEE?

In the description of TROPOMI NO2/HCHO data, the spatial resolution is 0.01 arc degree [see following(1)], however the Image Properties says the spatial resolution is 3.5×7.5 km² [see following(2)]. Also,...

Asked on 11/29/2020 by Tongwen Li

0 answer

Printing Output in PyQGIS Plugin

In developing a PyQGIS plugin, I would like to be able to print out variable values to ensure that my program has the desired functionality. I am aware that I...

Asked on 11/29/2020 by sam c

1 answer

Saving each feature in PNG format along with map canvas in certain scale using PyQGIS

I want to export each feature by zooming to certain scale (eg 1:25000 where feature will be inside map canvas) and save into PNG format. I know functioniface.mapCanvas().saveAsImage("image_path")but how...

Asked on 11/29/2020

1 answer

Google Map Control - Waypoints Route

I am working on a asp.net c# application by using google map control. I am displaying 80+ markers on the lat/ long receceiving from database. Now I want to display...

Asked on 11/29/2020 by user3125776

0 answer

Leaflet distinguishing sublayers within one GeoJSON layer

I would like to have more than one layer within one existing GeoJSON layer. I found some example here: http://www.gistechsolutions.com/leaflet/DEMO/sports/sports.html which refers to one .json file and...

Asked on 11/29/2020

1 answer

QField on tablet wont open project

I run QField on both a tablet and my phone. In the last couple of days I suddenly can't open any of my projects on the tablet. They all work...

Asked on 11/29/2020 by marcp

0 answer

Leaflet only allows polygon layer from GeoJSON to be displayed one time

I have used an AJAX call to load a Black Sea GeoJSON that I want to display as a polygon on the map.var blackSea = [];var blackSeaData = new...

Asked on 11/29/2020 by Theodcyning

0 answer

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