All Questions

0
votes
0answers
4 views

Specifying Decimal Places For X and Y

My boss requested that when I calculate geometry (decimal degrees -- PCS NAD_1983_StatePlane_Virginia_South_FIPS_4502_Feet) X has 8 decimal places and Y to have 9 decimal places. I'm adding 2 fields ...
0
votes
1answer
29 views

Stop SQL Server selecting outside buffer

I am trying to select all the parks within 200m or a railway. I can easily create and visualise the 200m buffer. However when i try and find only the parks that intersect it i get all parks returned,...
4
votes
1answer
44 views

Updating Algorithm list in pyqgis3?

I am attempting to run a union operation in a standalone pyqgis script and I'm receiving this error: Algorithm qgis:union not found The union operation fails with this code: params = { 'INPUT' ...
0
votes
0answers
6 views

School boundaries [duplicate]

I have seen this post which seems to be the closest to my need. When I download the docs, either I have no ways to filter the document or I don't see all schools. I have been trying for a week now. ...
0
votes
1answer
23 views

How to get equidistant points from a linestring (geographical coordinates) [on hold]

I want to resample geographical coordinates based on a specific number of values, let's say, 1663 for the following case: -78.0599088 -11.89402416 -78.04317744 -11.88622134 -78.0267798 -11.87700462 -...
0
votes
0answers
6 views

How do I UPDATE (not grow) polyline as car moves - Google Maps? [on hold]

I tried Googling my problem but could only find solutions showing how to add points and grow polyline as vehicle moves. But I wish to UPDATE the polyline (i,e grow or reduce) I am implementing a ...
0
votes
0answers
4 views

ArcGIS Mapserver Layer via pyqgis with dynamic layer properties

Is there any possibility to add esri mapserver layers to qgis with dynamic layer properties such as transparency,etc. iface.addRasterLayer("url='https://sampleserver6.arcgisonline.com/arcgis/rest/...
0
votes
1answer
46 views

How exactly do I use the GeoDjango Union function?

I have two models in my application: class Organization(models.Model): consortium = models.ForeignKey('Consortium') org_map = models.MultiPolygonField() class Consortium(models.Model): ...
2
votes
0answers
24 views

Using ogr2ogr on Anaconda

I am building a Choropleth map in D3.JS. In order to do that, I have downloaded a map from Eurostat. From the GeoJSON file, I want to extract the country for the visualization, in my case Portugal. ...
0
votes
2answers
48 views

Extracting OpenStreetMap Bus Routes using ArcGIS Desktop?

I am wanting to extract bus routes from OpenStreetMap to use as shapefiles in ArcGIS. Is there a simple way to go about this? As i am trying to extract them directly from OSM however i keep ...
0
votes
0answers
6 views

Python Scripting in QGIS - add features and select them

I'm trying to migrate a python plugin I wrote from QGIS 2.18 to QGIS 3.4. In the plugin, I'm creating new vector features and eventually adding them to an existing vector layer. My wish is to have the ...
2
votes
1answer
253 views

Python folium package for 'satellite' map

I am trying to have a zoomable satellite map for my Transportation network analysis. Other free maps all OK but could not get satellite to work. I am using: token = 'pk....
0
votes
3answers
30 views

Problem editing, clipping, and saving large shapefile QGIS 3.4

I'm working with a very large shapefile in QGIS 3.4. I only need one section of the layer (near the main city, not the areas outside it) and I'm trying to delete the large sections which I don't need. ...
0
votes
0answers
35 views

Sampling shapefiles without replacement using R?

I have many road shape files with road segment ID and corresponding mean value in them.I want a dataframe of sampled shape files without replacement. For each road segment from 1 to 534, I need to ...
0
votes
1answer
50 views

PostGIS - How to create an outline of a ship given the geom of the GPS aerial, ship dimensions, true heading

I have a table of AIS positions for a vessel and its true heading. I also know the distance of the GPS aerial to the bow, and the starboard side, and the overall length and width of the ship. I want ...
3
votes
0answers
34 views

Shapefile polygon operation efficiency

I would like to make a graph from a shapefile, where edges would express spatial relations between polygons according to DE-9IM For that, I use fiona + shapely My code is working but it is extremely ...
0
votes
1answer
36 views

GUVI TIMED L1 files and netCDF

I am having an issue, which has essentially seemed to have split into two different issues. I was initially trying to work with TIMED satellite data, starting off with GUVI 1C data. Rummaging around ...
0
votes
0answers
10 views

Google Earth point to polygon

I had marked the points in Google Earth. I wanted to create polygon feature by using the point as centroid is there any way I can do that or else need to digitize the polygons?
0
votes
0answers
13 views

Loop all the raster files in the same folder? [on hold]

I'm trying to calculate mean of rasters NDVI for the same years. I have 10 rasters. How can I loop all the raster files in the same folder to calculate mean and add to dataframe? The following code ...
0
votes
1answer
28 views

Which datum transformation should I use when projecting from 4326 to 53008 in ArcMap?

I have a polygon shapefile which is on WGS84 and I want to re-project it on EPSG:53008 (World Sinusoidal). When I'm trying to do it either by 'Save as' or by 'Data management tool - Project" it says ...
0
votes
0answers
16 views

Trying to figure out ArcGIS API's `mapScale` variable and how it maps to OpenStreetMap's zoom level

I'm using ArcGIS' /export endpoint to get an .svg of a few map layers given a specific bounding box. However, when I apply the .svg as an image overlay to OpenStreetMap's world map using Leaflet, the ...
1
vote
1answer
29 views

In CartoDB, can columns (e.g. ARPU2011) have descriptions (e.g. Average Revenue Per User 2011)

I have an in-house database with spatial data (Postgres + PostGIS) for which I'm generating an extract (GeoJSON/KML etc) in order to load it into CartoDB. My column names are technical (e.g. ARPU2011,...
1
vote
0answers
8 views

What are the possible values of iconSize (Leaflet Marker Icon Options)

I have a very standard script: var redIcon = L.icon({ iconUrl: '1.png', iconSize: [10, 10], // size of the icon iconAnchor: [5, 5], // point of the icon which will correspond ...
0
votes
1answer
39 views

Write GeoTIFF in Python without GDAL

I have a code to transform numpy array in TIFF image using Pillow. But now I need to georeference the tiff to later use it in a GIS software. In my case, I have the latitude and longitude of each of ...
0
votes
1answer
30 views

Seeking remotely sensed data for measuring urban gardens?

One of the students in my lab is currently seeking methods for measuring the very small size of urban green spaces in people's gardens. Is there a data set out there that may be appropriate for this?...
2
votes
1answer
15 views

Using Plugin > Map Creator > Set Layer CRS

I am using map creator and I would like to permanently set the layer CRS value. I place multiple maps within one project on QGIS, and I have to manually set the CRS value each time a new layer is ...
0
votes
0answers
8 views

Mosaic to new raster execution

Mosaic to new raster execution is successful, but the layer does not show in layers but is in documents which have an error message as "Invalid raster dataset failed to create raster layer"
0
votes
0answers
9 views

Choropleth map using D3.js

I want to build a Choropleth map, from a specific region (in my case Portugal) with D3.JS and while searching for tutorials and support, I have found this website. Following the proceedure, I have ...
1
vote
0answers
11 views

Does Ionic Offer Mapbox Navigation?

Is Mapbox Navigation compatible with Ionic? I can only find SDK for both Android & iOs but nothing on cross platform technologies. https://www.mapbox.com/navigation-sdk/
0
votes
1answer
40 views

Geodesic distance from raster in python?

I am carrying out some analysis in python (using Anaconda), I have a binary raster and want to perform a geodesic distance calculation from all areas with a value of 1- I can do this within QGIS using ...
0
votes
0answers
8 views

How to make Qt designer form annotations show up in print composer

Firstly, I am a QGIS novice, and even less so with QT Designer. I was able to figure out how to use QT Designer to make a QGIS Form Annotation. It sync's well with my data, but I have a problem with ...
1
vote
0answers
14 views

Get Value of more than 1 row using ArcGIS ModelBuilder?

In ArcMap, ModelBuilder, in the Model Only Tools, Get Value only takes the fist row. How can I now take 2 or more rows and only select values from a specific column? I want to rewrite them ...
0
votes
1answer
29 views

Modify Path Access Restrictions

for personal usage, I downloaded an openstreetmap map (as a *.osm) and try to modify it using the Josm editor. I want to trace a path in the card I walked and want to remove unnecessary things from ...
3
votes
2answers
187 views

Creating polygon from hole in QGIS?

I work with this polygon and try to find a way to create a new polygon from the empty gap (not distinguish it) in the middle of the polygon. I succeed to do it with a "difference" tool- but used with ...
0
votes
1answer
19 views

Use Image in calculation if a certain property is given

The goal is to select certain images from an image collection of Landsat 5 raw scenes, which possess a property called RADIANCE_MAXIMUM_BAND_6, since not all images contain this property. if (...
0
votes
1answer
33 views

How to calculate the azimuth for the shortest line from a point (start) to a polyline (end) - NNJoin

How can I calculate the azimuth for the shortest line from a point (start) to a polyline (end) - NNJoin calculate only the distance and join the attribute from the line to the point attributes. Does ...
0
votes
1answer
41 views

Seeking tutorial on Time Slider in Carto?

I want to add a time slider to a map. It looks as if I have to do that via CartoCSS but I really don't know where to start. Unfortunately, I don't understand what all the other posts regarding this ...
2
votes
1answer
35 views

Run GDAL on android and perform operations

Could one run gdal on android devices to perform some GIS operation, like viewshed, contours, etc?
25
votes
4answers
63k views

Converting vector layer to raster using QGIS?

In qgis in the raster menu there is an item "convert vector to raster". This behaves strangely - I do not understand how it is supposed to work. I can select a vector file, an attribute and an ...
0
votes
2answers
232 views

Leaflet - map.fitBounds() / map.getBoundsZoom() BROKEN after resizing map?

https://jsfiddle.net/MaxHeadroom/s6h40xrn/ If you resize the map size, the zoom level should be adapted to always show the orange rectangle at maximum possible size. But fitBounds seems to be broken ...
0
votes
2answers
46 views

Zooming in on raster file in R

I used the nsidcICE function located here: https://github.com/cran/raster/blob/master/R/nsidcICE.R and the following code to open a sea ice raster file. However, I would like to overlap vector points ...
2
votes
1answer
36 views

Modify streaming interval in Collector for ArcGIS Online

I'm using ESRI Collector App. I'm tracking location. Is there a way to modify the ESRI location tracking layer for it to use an interval under 5 seconds?
1
vote
1answer
38 views

Splitting polyline at multiple points using Mapinfo Pro?

I have a table of points and used the mapbasic app "Connect the Dots" to create a polyline. The problem is it creates a single polyline and I want to split it up into separate lines so I can delete ...
0
votes
1answer
41 views

Locating project templates in ArcGIS Pro?

Does anyone know where the blank, global, scene and map aptx files in ArcGIS Pro are stored? I notice that any project settings that you change, persist. I'm trying to get my blank.aptx to go back ...
0
votes
0answers
20 views

Place names have disappeared from Google Earth Pro?

Since I allowed NBN to take control of my internet no information apart from basic aerial photographs appears on Google Earth Pro. Is this related to the inability of iinet to provide what they ...
0
votes
0answers
13 views

Removing white background from raster as well as cleaning up edges

I am looking to remove white background from a tiff as well as cleaning up the edges. I have used display background values from the symbology tab as well as applying gamma stretch for edges.. I can ...
3
votes
3answers
17k views

Accuracy of ruler in Google Earth Pro?

I use Google Earth Pro (7.1) on a daily basis to assess the acreage of US agricultural fields using the GE ruler. What is the accuracy we can expect from Google Earth Pro for surface calculation? (...
1
vote
0answers
17 views

QGIS (2.18) Processing post-execution script hook to clear scratch layers?

I've been cobbling together some Processing scripts for QGIS 2.18 (I'm not a fan of QGIS 3 scripts), and I keep running into one particular problem: my script creates a lot of scratch layers and they ...
1
vote
1answer
4k views

Installed pywin 32 — still getting error — “No module named win32com.client.”

I'm trying to install pywin32 (32 bit 2.7) so that I can run python from ArcGIS 10.2.1 (32 bit), and have access to the pywin modules. But I am getting the error "No module named win32com.client." I ...
0
votes
2answers
17 views

Using ArcPy with ArcMap Layout View to ExportToTiff with geotags?

I feel like this should be a lot easier than it is, all I am trying to do is create a geotiff that contains spatial referencing from arcmap in an automated manner as I have thousands to create. ...

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