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votes
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12 views

Sketch Widget in JavaScript API for ArcGIS

Is there any way to extract the coordinates of the vertices of the graphics drawn using sketch widget? I want to use those coordinates to generate a kml file.
-2
votes
1answer
18 views

Converting raster layer to simple feature in R

I have read my raster data using r <- raster("F:\\Studies\\Whole2015.tif") class(r) > class(r) [1] "RasterLayer" attr(,"package") [1] "raster" How can I transform my data to simple feature? I ...
-2
votes
0answers
12 views

Selecting pixels based on average impervious surface of surrounding neighborhood

I am working with the National Land Cover Database (the impervious surface layer, wherein each pixel is designated as x% impervious surface), which has 30x30m pixels. I actually needed a lower ...
-1
votes
0answers
14 views

PostGIS Tiger Geocode and Return Zip4

How can I get the zip4 column to return as part of the address (addy).zip4. If it cannot be returned with geocode is there an alternative to getting the Zip+4 for an address?
2
votes
1answer
20 views

SQL query for private OSM Server

I'm trying to make a SQL query in my own OSM server which filters are the tag of the object (for example k = 'highway') and the name of the user that created the object (for example display_name = '...
1
vote
1answer
24 views

Creating a mapset and PERMANENT location for multiple GeoTIFF files in GRASS GIS?

I have a 2 year MODIS time series, with 45 files, all in tiff format. However, I don't know how to create a mapset for all files. I can only do it for one file. How do I create for my entire time ...
0
votes
0answers
10 views

Mapbox GL JS - Show features based on zoom level

This is what I am trying to do in Mapbox GL JS (I am new to it): I have a spatial dataset of US cities. Each city has a ranking attribute (1-5). At the default zoom level, I want only the major cities ...
-1
votes
0answers
19 views

Determining if address is on a dead end street using REST API [closed]

How can I determine if an address is on a dead end street using REST API? Geocoding or directions don't necessarily appear to provide information about the address being on a dead end street. Any ...
0
votes
0answers
36 views

Global Mapper: Slovenian LiDAR very little shift on projection

I downloaded LiDAR data from Slovenia (link on the bottom). After searching google for the right projection, I found that normally I should use MGI 1901/Slovene National Grid; EPSG:3912 or Slovenia ...
-1
votes
0answers
11 views

arcpy.MakeXYEventLayer in Python is not working

I am trying to get some tables with X and Y from SQL using these steps in ArcGIS Pro, I had a model there which is working fine but when I tried same logic in Python I am getting errors. My steps for ...
2
votes
1answer
22 views

How to reference a PostGIS JSON field in GeoServer SLD

I have a PostGIS table with a JSON field which I successfully published in GeoServer 2.16 The contents of the JSON field (named "display_properties") are an array and like this (some values have been ...
0
votes
0answers
15 views

Getting grayscale heightmap from Terrarium map

I'm downloading Terrarium maps from AWS S3 and I'm unable to generate a gray heightmap out of it. Does someone know the formula to translate the pixel RGB values into the grayscale (0, 255) heightmap? ...
1
vote
1answer
28 views

Converting CRS in GeoJSON file from user defined CRS to EPSG 3857 and EPSG 4326

I have GeoJSON file which is obtained from conversion of shape file in QGIS3.10.0. Originally it was created by survey data of electronic total station. Geometric coordinate system then converted to ...
1
vote
1answer
27 views

Convex hull for selected features - PyQGIS

I changed the code to create a convexhull for selected features from this question (Convexhull for selected features and performing buffer for the resultant convexhull using python) to adapt it to ...
-1
votes
0answers
12 views

Raster merge in QGIS 3.10 deletes scale

I try to merge 2 raster tiffs in QGIS 3.10 (Raster-Miscellaneuous-Merge). The merge is executed but the resulting map is just black, the scale is set to 0, i.e. all the information of the rasters is ...
0
votes
0answers
20 views

Leaflet maps with a dark theme style

I have not seen many leaflet maps setup with a dark theme where maps are dark-grey-black, the tools - control layers are white with darkish backgrounds. Would love to see some samples as I'm looking ...
0
votes
1answer
13 views

What is the visualization parameter of Water Occurance Layer transiting from 1% opacity red to 100% opacity blue?

I want to display my water occurance layer whose value ranges from 0% to 100% as the sample in GEE, but I did not find the corresponding visualization parameters in its Data User Guide. Dose anyone ...
2
votes
0answers
10 views

Python Error: “Data driven pages is not enabled”, when they are enabled

I am exporting Data Driven Pages using arcpy (ArcMap 10.5, Python 2.7.13). I have used this script many times on this exact same MXD to export DDP to TIFF: import arcpy mxd = arcpy.mapping....
2
votes
1answer
23 views

Export to drive - User memory limit exceeded

I am using the GSW seasonality raster in GEE. I started with by clipping the GSW to the whole South America region and masked this region only. However I do not manage to export to drive and I get the ...
0
votes
0answers
8 views

Carto.js v3.15.19 and Leaflet integration

I was trying to integrate Carto.js v3.15.19 with Leaflet. But it seems that is a conflict. Calling carto.createLayer()..... throws an error saying "The provided object is not a layer". Is there a ...
0
votes
0answers
20 views

Export portion of .qgz to .dxf file

I am using QGIS. How do you export only a portion of the .qgz file database to a .dxf? The database is too large to bring all of it in, even with individual layers. Also, the CAD entities have a ...
0
votes
0answers
23 views

Figuring out CRS projection of .nc file

I have 3 .nc files that were given to me without specifying which projection was used for the (lat, lon) coordinate pairs. Is there an attribute or a way of figuring it out given the latitudes and ...
-1
votes
1answer
25 views

Change the data for the chart

I've used this code: Leaflet and Popup with D3 for my Leaflet project. The problem is, I don't understand how I can change the data. I don't need months in the chart but something else. Where in the ...
0
votes
0answers
11 views

Carto.js v4.2 and NamedMaps

I was trying to update my carto.js code from v3.15.19 to v4.2. What I recognized that carto.js v4.2 is no longer support NamedMaps. I researched a lot and checking into the documentation made me ...
0
votes
0answers
40 views

Many to many relationship in a QGIS Geopackage - fail

The current user manual has been unsuccessful in directing me to establish a many to many db relationship in a geopackage in QGIS (3.10.2 on Ubuntu w gdal 2x). After the airlines in the manual ...
2
votes
1answer
18 views

Combining overviews for a large multiband raster image?

I have several large rasters, complete with overviews. I have combined these as separate bands of a multiband virtual raster. However, QGIS performs very slow viewing this vrt. Is there a fast way to ...
3
votes
1answer
61 views

Transform Excel into vector in the Graphic Modeler

I have a graphic modeler with two inputs, a shapefile and an Excel file. I would like to make a join by attribute between the two. But I am confronted with a concern, the join can only do this between ...
0
votes
0answers
30 views

QGIS Distance Matrix tool

I want a distance matrix to calculate the mean distance between all points and all points with a common attribute (postcode district) in a single layer. Is there any way of doing this in QGIS? As an ...
0
votes
0answers
13 views

Extract raster by mask turns out a raster with all zero values

I use a shapefile of polygon to extract a raster. The result turns out to be a raster with all zero values. I'm not sure where it went wrong. Has anyone met this problem? In the figure uploaded, ...
0
votes
0answers
11 views

Add corresponding MODIS LAI band to Sentinel-1 log(VH/VV) data in Google Earth Engine

I am trying to determine the correlation between Sentinel-1 log(VH/VV) data and the corresponding MODIS 4 day LAI product. For the first step, I am trying to add the corresponding LAI data as a band ...
0
votes
1answer
31 views

Does GeoServer support OpenStreetMap OSM format?

Apologies if the question has been asked but I am kind of lost between al the resources and tools available. I set up a GeoServer and have been reading the documentation but I still don't understand ...
-1
votes
0answers
23 views

Rasterio: change singelband gray to singleband pseudo color for multiple colors

This is in reference to: Convert gray band from dataset to RGB with rasterio for population density however there is a difference. I have been playing around with QGIS which I had opened the ...
-2
votes
1answer
23 views

Spatial reference in Arcpy

So, I have the following code to write onto a report the spatial reference of a feature class. My workspace (geodatabase) contains, 3 feature classes; studyarea, destination, and source. For some ...
0
votes
0answers
12 views

Problem running GRASS with R

I'm not very sure if we can still connect GRASS with R. I was trying with my GRASS 7.8 and R 3.6.2 in both directions suggested in R statistics wiki. I have installed and loaded rgrass7, but have ...
0
votes
1answer
45 views

Importing CSV as a point layer via the Python console. No point layer is loaded. How can I fix my code?

Code import os from qgis.core import ( QgsVectorLayer ) uri = r"file:\\\C:\Users\imper\Desktop\XYbuffer_tool\Calapan_XYpoints_comma?delimiter={}&crs=epsg:32651&xField={}&yField={}"....
0
votes
0answers
12 views

Line to points R

I am trying to convert a polyline to a series of points. My polyline is a simple shapefile. So far I have used the command below which does a great job in converting my line to a bunch of points. ...
-1
votes
0answers
13 views

Zonal statistics as table produces zero value in the table

I got a raster data B which is calculated by raster calculator from raster A. I got a polygon to calculate the minimum of raster B and it turns out zero. But I checked the raster B's minimum and it ...
0
votes
1answer
16 views

Spatial join - allocate values from joined polygon based on input polygon

I'm trying to determine population inside Special Flood Hazard Areas. To do this I'm doing a spatial join of census shapefiles with the FEMA National Flood Hazard Layer, using the Boolean field ...
0
votes
1answer
31 views

Leaflet change from JSON to CSV

Still to new to Leaflet but with small steps.... I will get somewhere. I am loading now with jquery.getjson (and this works fine) // Load the data jQuery.getJSON("data/lieux_culture_nantes.json", ...
0
votes
0answers
10 views

Basemaps without a portalitem ID

The goal is to save the state of a basemap from the basemap gallery, then re-render it later. I have done this sucesfully with all my basemap using the below portalItem.id however there are a few ...
0
votes
0answers
17 views

Calculate Volume of Thickness/Difference Raster

I have two LiDAR datasets, and I would like to know the volume of their difference. I used raster calculator to produce a "difference" raster. What I need now is a way to be able to calculate the ...
-3
votes
0answers
22 views

Calculate profile curvature based on different algorithm in ArcMap? [closed]

I want to calculate profile curvature in Window/Kernel size 5*5 (and another size) based on different algorithm like Evans-Young algorithm in ArcMap software (like the photo). I need a sample code ...
0
votes
0answers
9 views

Projections don't match between ERDAS IMAGINE and ArcMap

I used GIS online services from NOAA to georeference an image in ArcMap. In ArcMap I exported the file to produce an .img. In ArcMap the Current Coordinate System reads (...
1
vote
1answer
16 views

Creating multiple polygons from a list of coordinate matrices using sf in R

I'm trying to create an sf object representing the extents of geometry objects in an existing sf object. I would expect that st_polygon() could create a list of polygon objects directly from a list of ...
1
vote
1answer
10 views

Creating a useable Geometry for GeoTools

Just getting into using the GeoTools framework, after having done a lot of things manually. One of my previously-written functions transforms a given lat/lon/height between CRS. I found this link: ...
-1
votes
0answers
12 views

Comparing two text fields in one Table in ArcPro [closed]

In ArcMap I was able to use the isSame steps in https://support.esri.com/en/technical-article/000011200 to field calculate and return a "Yes" or "No" but when I try to run this in ArcPro I get an ...
0
votes
1answer
53 views

Transfer & maintain a relational database in QGIS - backend vs frontend

I'm going to set up a small db for my own use in QGIS. I can see only a few of the many tables will be spatial, but the ease of use and capacity of the widgets in QGIS are attractive. I won't writing (...
1
vote
1answer
31 views

Convert gray band from dataset to RGB with rasterio for population density

Edit: Just to clarify, I'm seeking a solution that provides me a range of values rather than the provided 0 and 255 from rasterio. That most likely meant, imo, that I had to set the photometric and ...
0
votes
0answers
18 views

Finding the distance of each “leg” in a path

I have a shapefile that contains ~550K polylines that each represents the Google Maps recommended path between bike share booths. I laid the shapefile on top of the shapefile for census tracts in New ...
0
votes
0answers
13 views

ArcGIS Pro: Points to Line will not accept point feature class

I'm trying to make a graphic for a presentation where multiple points are connected to a single origin (hub and spokes). I initially had over a thousand spoke end points but many of them were ...

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