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6 views

Nearest Neighbor Two Point Tables Return Line Geometry

I am looking to find the nearest neighbor between two point tables in postgis and return the ids of both along with the line geometry. I have been able to determine the distance for the nearest ...
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0answers
7 views

GeoSpatial data in Hadoop - HDFS or HBase?

When should I use GeoSpatial data in HDFS and when in HBase? Seem that for HDFS I should use ESRI Geometry and Hive Spatial, and for HBase use GeoMesa? Sample query we require - For a defined polygon (...
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0answers
6 views

PostGIS-syntax: export query-result to QGIS / Shapefile

Thanks to a previous post, I was able to solve a long-standing problem by creating a geometry, using a SQL-query with PostGIS. However, I want to use the created geometry in QGIS and have problems ...
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0answers
6 views

ggplot with island

The data for this example can be found here: https://github.com/davidbaniadam/maps So I am creating this plot: But I want to keep the actual size of the small island. How can I do that? I have also ...
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0answers
10 views

Labels disappearing after reopening map in QGIS?

I created labels for a set of 10 cities in Alaska, adjusted their position & added masks. I saved & closed, then reopened a few minutes later and the labels have disappeared. I tried ...
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0answers
8 views

How to keep the image of a collection that are integrally contained in a geometry boundary in Google Earth Engine?

I have an image collection and a geometry ROI var ROI = ee.Geometry.Rectangle(-78.20688664502586, 34.67650023609108, -77.65207707471336, 35.216816430066366); var l5 = ee.ImageCollection("LANDSAT/...
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1answer
18 views

QGIS Opacity issue with polygons and labels

I have a layer with a number of polygons. I can happily adjust the opacity of the polygons using the normal slider, but when I add labels to the polygons from the Attributes table the labels do not ...
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0answers
6 views

Population centroid of irregular-shaped German counties based on a population density grid

I'm new to QGIS and stuck with this task. Here's the data I'm working with: 1-square-kilometer grid Shapefile of Germany (https://www.zensus2011.de/SharedDocs/Downloads/DE/Shapefile/Inspire.zip?...
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0answers
8 views

Calculating water body area in Google earth engine using Landsat images [on hold]

I am attempting to calculate the area of water bodies in my classified map. GEE tutorials showed me a method (https://code.earthengine.google.com/b24cfb66585792b77f6336a8722d1081), however I ...
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0answers
9 views

How to create a raster file with multiple attributes from numpy arrays?

I have 2 numpy arrays (same dimension) which I would like to use to create a TIF raster file with 2 attributes. I'm trying to do so with rasterio with the following piece of code: out_meta = ..... ...
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0answers
10 views

Segmentation in OTB gives blank rectangle as output

I am trying to segment a raster image to get a vector output. I am using OTB 6.6.1 in QGIS 3.4. In the segmentation window, I selected the input raster which is a 3 band (true colour) sentinel 2 image ...
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1answer
23 views

PostGIS: syntax-basics for function

I'm a complete newbie in PostGIS - I tried to solve a problem I had in QGIS (see this older post). Basically, I just need to know how the correct syntax works to use the function ...
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0answers
13 views

ST_MakePoint outside PostGIS

To import data into a PostgreSQL/PostGIS database I need this CSV format: "1,nameOfPoint,0101000020E6100000689DA690152F114090338CFF9B0B4A40,2019-07-22 19:56:03.603+00,2019-07-22 19:56:04.243+00" ...
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0answers
12 views

Getting all footways in a bounding box with Overpass API?

I am trying to use the Overpass Python API to find the all footways from OpenStreetMaps within a given bounding box. This is my first time using this API and am quite unsure how to write this query. ...
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0answers
12 views

Deleting Picture Element using ArcPy in ArcGIS 10.3 Desktop?

I'm trying to delete a Picture Element from 45 MXDs. This code is a start for me: import arcpy from arcpy import env env.workspace = r"G:\PROJECTS\landuse\gis" for mxdname in arcpy.ListFiles("*.mxd")...
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0answers
12 views

Loading offline tiles as QgsRasterLayer in C++ or Python?

I have created tiles via Qtiles plugin in QGIS. Here is the code snippet I have so far: QString url = "file:///C:/Users/USER/Desktop/TiledMap/{z}/{x}/{y}.png"; QgsRasterLayer * lyr = new ...
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0answers
11 views

Issue translating UTM83-13F cords using c# dotspacial

I am trying to translate coordinates in C# so that I can do Geo lookup with Google Maps API. For example: [-344093.68,16850640.41] should come out to [-112.82816072375947,46.109509005723744] But ...
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0answers
9 views

Disorted Raster Using TIN

I'm trying to create DEM based on TIN from points layer that I have. this is how the layer looks like- when I try to use the TIN interpolation tool I fill it like that and I use the layer extent- as ...
-1
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0answers
20 views

Reclassify DEM not accepting number of classes? [on hold]

In reclassify dem, the system doesn't accept my number of classes and itself classify in 9 classes. What should I do?
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0answers
23 views

Creating shapefile based on map with ArcGIS Desktop?

I'd like to create a shapefile with ArcGIS of the map attached below. Published in an econ paper, the map divides the territory of the German Union (post 1815) in 19 states (more precision can be ...
0
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1answer
11 views

Set 00000 Input Transparent Color with GeoServer Rest API

I need to change parameters (Input Transparent Color) from layers in GeoServer. I have a lot of images to do it. So, I need to do this edit using GeoServer REST API. I did the code below but it doesn'...
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0answers
8 views

ArcGIS Pro Legend Format

I am new to using ArcGIS Pro and I have a problem regarding deleting some elements from my legend. More exactly, I have classified some pixel values in different categories, and some of these ...
0
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1answer
17 views

Computation over Dictionary

I have a code that analyze NDVI for any shapfile and then compute the mean and the standard deviation for each image. My goal is to be able to do more calculation with the statistics I have calculated,...
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0answers
15 views

Can ArcGIS solve split delivery problem, for each order split into like 2 or 3 orders ateast?

I am trying to solve the split delivery vehicle routing problem using ArcGIS desktop. I first tried splitting the orders into very small quantities like 20. Before splitting, my original orders were ...
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0answers
18 views

Using one shapefile to analyze different plots in GEE [on hold]

I have one shapefile of agriculture plots that looks like this- I want to run analysis in google earth engine but for each plot. Is there any way to run this analysis without saving each plot and ...
2
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0answers
35 views

Making map in Robinson or Winkel Tripel projection in QGIS

I am trying to make a map like this: https://docs.qgis.org/testing/en/docs/gentle_gis_introduction/coordinate_reference_systems.html#figure-robinson-projection I have downloaded a shapefile with ...
0
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1answer
34 views

Splitting field into several fields based on strings separated by space in QGIS?

I need to create dichotomic fields based on a single field which shows multiple choice answers in the form of strings separated by a space. What I want to do is this: The number of choices that will ...
0
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1answer
12 views

Translating one raster's contents closer to another’s with each at different scales using QGIS?

I'm working with multiple raster images, each in the Albers Equal Area Conic projection: one of the mainland US, one of Alaska, and one of Hawaii. I'd like to translate the Hawaii layer to be closer ...
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0answers
9 views

Multiband GeoTIFF loading slow in browser

Here's the problem: http://www.doctorharapos.com/webMap/geotiff.html My GeoTIFF files are light, just 4MB My process: starting from an ASCII Esri file I transform it to GeoTIFF using gdalwarp, ...
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0answers
17 views

Error with LinearFit in geographical line

I have a set of pixels that follow a straight line. However, the values aren't all clearly visible. I want to create a Line Feature that I can later use to identify it. I have created a Lon Lat ...
-1
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0answers
17 views

Merging raster images of non-contiguous US regions — which considerations + tools are important? [on hold]

I'm using QGIS to merge DEM tiles (.hgt files) for Hawaii and Alaska. This process seems to be much more time-consuming than when I previously did this for the mainland US states (I don't have an ...
0
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0answers
32 views

Compute polygons (Data Driven Pages) main angle when having ArcGIS Basic license

Is there a way we can calculate or when rotating polygons, actualize/update our "Angle" field in the attribute table by using Python? There is a tool in ArcGIS "calculate Polygon Main Angle" but is ...
0
votes
1answer
23 views

Point.in.polygon function in sf package miscalculate the distribution of points

I am using point.in.polygon function in sf package to determine whether a set of data fall within a polygon or not. Here is a snippet of the data and polygon visualization As the figure shows, there ...
1
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0answers
15 views

ImportError when trying to load otb (orfeo-toolbox) into QGIS Python Console

I would like to use the orfeo-toolbox via the QGIS Python Console, however, I don't seem to be able to import the otbApplication. I keep getting the following error: import otbApplication Traceback (...
0
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0answers
14 views

Decision tree in Google Earth Engine [on hold]

I am trying to do a decision tree classification in Google Earth Engine. The decision tree function has a treestring as argument. Can somebody explain me what is that?
0
votes
1answer
33 views

Get Attributes from Multiple overlapping WMS layers

I am working with Openlayers to consume WMS from GeoServer. I have loaded multiple layers and get attributes for one layer using getGetFeatureInfoUrl. But this approach gets attributes for the ...
0
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0answers
10 views

Plotting Raster Data on tkinter canvas using Rasterio

I am trying to plot my Raster Data on tkinter canvas using the following code: import tkinter from matplotlib.backends.backend_tkagg import ( FigureCanvasTkAgg, NavigationToolbar2Tk) # Implement ...
0
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0answers
21 views

Quantile Regression and Machine Learning Methods [on hold]

To predict quantiles for random forest I used quantregForest function easily and then I used predict function to get predictions for each quantile, and I did not have any problem. How can I do the ...
0
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0answers
15 views

Adding prefix to Literal in SLD?

I have a Sql Server Store in Geoserver. I want to create Attribute-based sld. I used Persian characters in Literal tag. Like this: <se:FeatureTypeStyle> <se:Rule> <se:Name>...
0
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0answers
27 views

Replicating standard D3.js Conical US Albers projection in QGIS?

Oftentimes, when I see maps of the US rendered online, they use a custom version of the Albers projection, like so: Alaska and Hawaii are off to the side, nicely arranged. I'd like to replicate this ...
0
votes
1answer
24 views

Extracting 2 groups of numbers from string in QGIS Field Calculator?

I have an attribute field that contains strings like "iuyluf45567kjyyr347fklj". All strings contain various amount of characters and digits (there is no clear pattern) but each string contains 2 ...
0
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0answers
7 views

Getting data manually from cartojs 4 dataview?

I have a series of Cartojs 4 dataviews, but I want to manually get the data instead to listening to the 'dataChanged' event (when multiple datasets are created, this end in multiple errors). I tried ...
-2
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0answers
32 views

Seeking maps of North America forest cover in 2019 for QGIS? [on hold]

Can someone link to the best maps of North American forest cover and average temperature available in 2019 that can be imported into QGIS? I'm trying to find the link on NASA's website for what they'...
0
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0answers
15 views

GeoServer startup problem and Error 503

I've been trying to set up Windows GeoServer version 2.15.2 through the binary installation, and am getting the following error when trying to access the admin interface HTTP ERROR 503 Problem ...
0
votes
0answers
10 views

Area Solar Radiation tool in ArcGIS - Outputs for all time intervals vs One Output

I aim to create output (solar map) every 15 minutes for the whole day and because I am not quite sure how it works, I wanted to validate the sum of radiation: I have created first output with 0.25h ...
0
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0answers
7 views

Making a raster coverage that shows the average speed of points

I had a layer of points of trajectory and I wanted to create a map of the average speed of the movement. I have a column of speed in the table of points. I created a big base raster coverage. Then, I ...
0
votes
0answers
38 views

Setting north arrow angle in QGIS?

If you select in QGIS: View, Decorations, North arrow, then a window pops up with some parameters regarding the north arrow. One of these parameters is Angle. If you select automatic, then the angle ...
0
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0answers
17 views

Plotting arrays of coordinates that are all under one column in CSV table?

I am trying to project specific route paths that all have coordinate points under a single column. Each row represents a different route path. Some of them go on for more than 100 coordinate points so ...
0
votes
1answer
28 views

Looping through two raster folders to perform raster calculation

I have two geodatabases with rasters containing information about "treecover" and "loss". The file names are slightly different but can be matched based on the last 8 characters (the coordinates of ...
0
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0answers
20 views

Joining a Pandas dataframe feature classes in ESRI geodatabase [on hold]

I have a pandas dataframe, what I wish to join to 3 different feature classes in an ESRI geodatabase. I need to open up the GDB, join the dataframe to each of the feature classes, one at a time, ...

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