All Questions

-2
votes
0answers
33 views

Writing shapefile from csv file in Python for QGIS? [on hold]

I have a couple of questions: How can I write a shapefile from a csv-file in Python for QGIS? Or how to convert a csv-file into shapefile with Python line code in QGIS? How to add a data point in a ...
1
vote
0answers
16 views

Adding tiled map to QGIS and exporting as web map

I have a set of drone imagery that was processed using Agisoft PhotoScan and converted to Map tiles. I am now looking on how can I add the map tiles in my QGIS for exporting as a web map? I have a ...
1
vote
2answers
56 views

Importing Excel into QGIS as layer and not as attribute table [on hold]

I'm trying to add Excel sheet as a point layer, that includes coordinates into QGIS. Instead of a shapefile, it comes as attribute table (layer name is shown and attribute table logo beside it ...
0
votes
0answers
44 views

Connecting Python application with QGIS? [on hold]

I want to make an interpolation map using the Python programming language, which I know we can use. The Python console contained in QGIS. But I want using "stand-alone" (external) Python application ...
1
vote
0answers
33 views

Extract QGIS style as geometry in a DXF

I have a qgis point layer with a complex data driven style: This is the style without other layers: When exporting the layer as Dxf I would like to also export the style so the symbols are visible ...
1
vote
1answer
14 views

Creating and publishing a new layer in Geoserver using Geoserver Rest API

I want to publish a new layer in Geoserver. The layer seems unpublished and I get 'Undefined' error. const publish = function () { return new Promise((resolve, reject) => { const layer = ...
0
votes
0answers
11 views

Arcmap (v10.2) Model Builder: Field parameter with number [duplicate]

I created a very simple model like this: So when I start my model, I put the feature I want to export, and the name I want. It works fine if I enter only letters in the field. But I want to enter ...
1
vote
4answers
47 views

FME Merge two files that only have some attributes the same

I am trying to join 2 spatial files that have some but not all attribution the same. One of them (property_template.tab) has no data but has the schema that I want. The other one (cadastre_bpoly.tab) ...
0
votes
0answers
10 views

Developing automated land subdivision tool using ArcObjects? [on hold]

How do I go about generating a tool that can be able to subdivide a parcel of land into lots and also have access roads to each lot given the coordinates of each corner?
2
votes
1answer
37 views

Exact values not possible in graduated colors symbology in Arcmap?

I have a shapefile with a field containing floating point numbers ranging from about -200 to 20. Many records have a value of exactly 0. I would like to symbolize the layer as follows: < 0 (green) ...
0
votes
1answer
18 views

Generating ee.Image from ee.Dictionary?

I want to make an ee.Image from an ee.Dictionary of values. I generated a dictionary using the following piece of code that takes a sample pixel's data from an image collection and generates a ...
5
votes
2answers
91 views

How to add text on top of symbols for vector layers in QGIS

I read the QGIS 3.2 Changelog and saw a new feature to add text on top of symbols for vector layers. Does anyone knows how to do this?
3
votes
2answers
37 views

Inserting field values in table?

I am trying to insert Field Values to an empty table. My code by so far: arcpy.CreateTable_management(r"C:\Users\esri\Documents\ArcGIS","test") arcpy.AddField_management("test","total","LONG") arcpy....
0
votes
2answers
34 views

Selecting multiple date ranges using Select By Attribute?

Using ArcGIS Desktop 10.6.1. I'm interested in selecting multiple date ranges using Select By Attribute. I've verified that each date range works. For example Date >= '2015-04-15' AND Date <= '...
-1
votes
0answers
14 views

How can I mask out top 5% of each bands of Landsat 8 imagery in Google Earth Engine? [on hold]

I need to remove top 5% quartile of the each band of Landsat 8 images before making the greenest or the barest pixel composite in GEE. I guess removing the upper 5% quartile of each band can remove ...
-2
votes
0answers
15 views

Digital Shoreline analysis system [on hold]

I have downloaded images from GEE in .tif format, now i wish to analyse the shorelines, but every time I try to cast transect it gives me an error message. Can someone tell me what could be the ...
0
votes
0answers
17 views

How to solve “wms file -blocekd” error in geoserver? [on hold]

I have created one workspace named "kolkata" at geoserver. within that work space i have created two storage like "kolkata-v" and "kolkata-r". within those storages i have added some vector layers and ...
0
votes
0answers
12 views

How to output raster that contains band numbers of pixelwise maximum values?

I have got a ndvi_2015.tif with 12 bands of monthly ndvi values (band 1 = January, band 2 = February etc.), which I used to create a summary raster layer using the max() function in R. Now I want to ...
0
votes
1answer
30 views

Export NDVI values from chart as JSON in Google Earth Engine

After filter OLI8 for a small area var collectionFilter = ee.ImageCollection('LANDSAT/LC08/C01/T1_RT_TOA') .filterBounds(geometry) .filterMetadata('CLOUD_COVER','less_than',4) .map(app); print(...
0
votes
0answers
22 views

QField not syncing data back to QGIS

I've used QField to collect data and create features. When I try to use the qfieldsync plugin to transfer the layers and data back to my QGIS project, it only brings blank layers without any of the ...
1
vote
0answers
18 views

Copy all features and attributes to a new dataset based on a template in QGIS Modeler

In QGIS desktop I can merge a template spatial file that has no data but all the attributes I need with another spatial file that has the spatial data where some of the attributes aren't in the ...
1
vote
0answers
16 views

How to crop raster in R without losing the colors?

I have a 2x3 raster in R, with values 1 to 6. library(raster) r <- raster(nrows=3,ncols=2,xmn=0,xmx=2,ymn=0,ymx=3,vals=1:6) colors <- c('red','orange','yellow','green','blue','purple') plot(r,...
0
votes
1answer
32 views

Why is PyShp unable to open my .dbf or .shp files? [on hold]

Trying to learn to use Python to map some geographic data by following some tutorial and I can't seem to get them to work. I'm hoping this is just a simple error on my part. First, the link(s) to ...
1
vote
1answer
18 views

Extract domain from ArcGIS Online feature service using Python API

I have a feature service with several coded value domains that I'm accessing as a spatially enabled dataframe using the python API. As far as I can tell, the dataframe only holds the code for each ...
1
vote
0answers
11 views

How can I smooth LineString coordinates with 1D Gaussian Filter?

I'm trying to smooth a LineString through 1D Gaussian Smoothing and I'm having a doubt on the steps required to implement it, regardless of programming language. I couldn't find by myself anything ...
1
vote
1answer
13 views

Saving Refactor Layer?

I used the toolbox to refactor attribute field names which worked well. However I then seem to have lost the changes as the layer was only a temporary scratch file. How do I save to make these ...
1
vote
1answer
44 views

Importing shapefile from website if download link is compressed file?

I'm trying to write an SQL query with PostgreSQL to download and import multiple shapefiles to tables in my database. All the links are of the form : https://www2.census.gov/geo/tiger/GENZ2010/...
1
vote
0answers
33 views

Routing on rail network with interim points (pgrouting)

I want to use pgrouting on a rail network, stored in PostGIS. For each service number I have all the station it stops at. Until now, I set up start and end nodes for the rail edges and created the ...
0
votes
1answer
33 views

Using Arcade in ArcGIS Online to customize labeling?

I am trying to clean up the labeling for a city zoning map using ArcGIS Online. To do this I need to trim the property address to only the numeric values, which has been accomplished, but due to ...
0
votes
0answers
11 views

Blank screen during collect data

During collect data while trying to zoom in or out. QFIELD will display a blank white screen with QFIELD log in the top left corner of the application. My version of Andriod is 5.1.1. Does
1
vote
1answer
23 views

ArcGIS Rest API returns No Results When Should Intersect

I can download statewide NY senate districts using ... https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/tigerWMS_Current/MapServer/56/query?where=STATE+%3D+36&text=&objectIds=&...
1
vote
0answers
84 views

Georeferencing Data Points?

I am looking for a coordinate system of New Zealand. I just have x/y coordinates of the south island, but no further information on the map. I have tried several systems and nothing did fit the data ...
1
vote
0answers
29 views

Problem with CORS on GeoServer running on Apache Tomcat

I am currently working on a little GIS web app using MapBox on the frontend and GeoServer as my WMS. I have GeoServer 2.15.0 running under Apache Tomcat 9.0.20. Both of them run on localhost but on ...
0
votes
1answer
40 views

Mimic in-line GeoJSON using fetch()

For simplicty, referencing this example: https://carto.com/developers/carto-vl/examples/#example-load-external-geojson-layer I would like to have this bit of code behave the same as through it were ...
0
votes
0answers
26 views

Finding spatial correlation between two variables? [on hold]

I have data on test scores and the income of different tracts, and I am trying to find if areas with lower test scores correlate to areas with lower incomes. I have tried looking at different ...
1
vote
1answer
28 views

QGIS 3 Edit Attribute Field Name

I want to change the name of an attibute field in QGIS 3. The duplicate referred to seems to require the plug in table manager which is no longer available. I have looked at properties and have spent ...
0
votes
0answers
12 views

OSM Overlapping Polygon symbolism editing .xml

Looking to show both administrative boundaries of counties as states. There seems to be something that is showing counties and not states when both are showing for a certain zoom level. attached is ...
-2
votes
0answers
21 views

Can auto fill rotation field with GPS bearing? [on hold]

As I collect point I want to save GPS bearing to attribute field?
-2
votes
0answers
59 views

How to make regression kriging with elevation in R? [on hold]

I am looking to display this kind of map for my country, can someone help me do it. The goal is to map some weather data based on altitude for example : temperature, precipitation,...etc. My main ...
1
vote
2answers
22 views

How to create a sub dataframe from a dataframe using specific columns

I have a dataframe that has more fields/columns than I want, so I am trying to create a sub dataframe that only has certain fields/columns. The following throws a TypeError: '(['uniqueid'], ['...
1
vote
1answer
28 views

Overlapping multiple images with cloud masked?

I am now using fmask algorithm to eliminate the cloud covered areas on Landsat images. I choose a period of time (Jan 1st 2017 to Dec 31st 2017), and selected the study area (Florida). I want to get ...
2
votes
2answers
37 views

GeoDatabase (GDB) import not working (QGIS3)

I have a *.gdb which I normaly could load in QGIS version (3.4 / 3.8) following that instructions (or symply drag'n'dop): Installing File Geodatabase (*.gdb) support in QGIS? But it returns a error: ...
1
vote
1answer
40 views

Combining PDFs in Folder using ArcPy for ArcGIS Pro?

This was able to combine two pdfs in a folder into one pdf, but unable to combine more than this. import arcpy, os # Set the workspace. arcpy.env.workspace = r"C:\Output" #Set file name and remove ...
2
votes
2answers
30 views

QGIS Project Variable as Integer

I need to count how many times I executed a Pyhthon script in QGIS and I would like to do so by using a project variable as counter. However, I can only create them as string, thus I can't perform ...
1
vote
1answer
24 views

How to compute the conditional function and output binary image in GEE?

I am now using Google Earth Engine to process the Landsat 8 images. Now I have calculated NDVI, EVI, mNDWI and generated some maps. I am now want to generate a function based on those indices values, ...
3
votes
0answers
41 views

Converting “From-To” matrix (wide format) to long format in QGIS? [on hold]

I am importing a csv matrix (non spatial table) |ALLIER |AISNE |ALPES |ALLIER | - |10 |200 |AISNE |70 | - |100 |ALPES |10 |100 |- What I want using Qgis |FROM |TO ...
1
vote
0answers
17 views

Minimal Distance Between a geometry and a layer on PostGIS [duplicate]

I am working on PostGIS where I have a two tables. Let's call them A and B. A is coming from a multi polygons layer. B is coming from a multi points layer. I have created a new column "min_distance" ...
0
votes
0answers
19 views

Install PyQt5 on Python 2.7 [on hold]

I have an ArcPy standalone script that uses PyQt5 for the interface: # -*- coding: utf-8 -*- # Import arcpy module from __future__ import print_function import datetime import arcpy import os import ...
0
votes
0answers
18 views

Quicker function than dissolve and difference

I'm on QGIS (v. 3.6) trying to create a map of Florida's hydrography using the NHD "Water Areas" shapefile. Methodology is to fix any invalid geometries in the NHD data, dissolve the layer, and then ...
1
vote
0answers
10 views

QGIS: Raster Volume Method Elaboration

I'm trying to find the void space (air) of my DEM but confused how the SAGA algorithm works. My max and min of the DEM is 140m and 80m. Methods and results are: "[0] Count only above base level" (...

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