Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 12

Interactively Display Values of a Heatmap.js leaflet.js Heatmap Layer

In this example of the heatmap.js tool, I see how the values of the heatmap is returned by using heatmapINstance.getValueAt(): demoWrapper.onmousemove = function(ev) { ...

Asked on 12/08/2021

1 answer

Joining attributes by location for multiple layers using PyQGIS

Using the script below, I've created a list of catchment area corresponding to a list of outlets. It works perfectly but I would like to keep the attributes of my...

Asked on 12/08/2021

1 answer

Zipcode shape database as lat/long data

I would like to be able to have the Lat/Longs of each zipcode in the United States so that they can be mapped out as polygon shapesI have used...

Asked on 12/08/2021

2 answer

Converting latitude, longitude to image coordinates

I have a 2D image and I know a given pixel in the image corresponds to a particular latitude longitude (so basically a reference point). The image I have is...

Asked on 12/08/2021

0 answer

What is the unit used by Gdal.GetGeoTransform?

I tried to retrieve the resolution of a raster image with Gdal in a python notebook to convert surfaces from pixels to hectares.import gdalfrom osgeo import osrsrc =...

Asked on 12/08/2021

1 answer

Labeling grid automatically using QGIS

I have a polygon layer with a number as label. Now I want that my labeling is always in the left upper corner of the single polygon, like in the...

Asked on 12/08/2021

2 answer

Classification: Layer error: Classifier training failed: 'Only one class.'

i am new in GEE and try a tutorial from this https://www.gears-lab.com/intro_rs_lab4/ but the result show error classifier training failed: 'Only one class.'. So i try to...

Asked on 12/08/2021

1 answer

QGIS 3.10.8 Add features and attributes to exisiting layer using python

Is there a way to add features from one layer to another while matching attribute names using Python? Using QGIS 3.10.8I am trying to add features to an existing...

Asked on 12/08/2021

1 answer

Create new date for temporal layer in QGIS

I have a bunch of features (e.g. 'sampling point 1') and am storing a bunch of environmental data for each feature (e.g. 'pH', 'EC', etc.) plus a date. The new...

Asked on 12/08/2021

2 answer

How to remove extra field from LAS file with laspy

I have LAS files with a useless extra scalar field (named "tree") that I would like to remove. I tried the following code to create a new LAS file, copy...

Asked on 12/08/2021

0 answer

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