0
votes
0answers
6 views

How to find out poistgis.backend

How can I find out which poistgis.backend (geos or sfcgal) I have?
0
votes
0answers
4 views

Openlayer 3: geoJSON clustering failed

Ive been trying to use the basic example from openlayer website to create a simple clustering map for my geoJSON data. However, Im not getting any luck to generate any clusters. Below is my code, many ...
0
votes
1answer
2 views

How to change color of a layer in openlayers?

http://www.cv.nctu.edu.tw/shapefile-js-openlayers/ol_simple.html this is my website for test. I add two layers in openlayers. And I want to change color in one of two layers. var myStyle = new ...
0
votes
0answers
9 views

Four parameter Helmert transformation using four points

I'm looking for an algorithm to calculate a Helmert transformation using four reference points. Plus, does anyone know how I can calculate the error once I've completed the transformation?
0
votes
0answers
14 views

Script and model crashes after first iteration

I have a python script which dies after the first iteration. It dies on the second feature class to coverage. This also happened in modelbuilder, which is why I went to python hoping it would go away. ...
1
vote
0answers
13 views

Adding Nodes to Linestrings at Overlapping Points with Polygon Layer in Spatialite?

I have two Spatialite layers, a LINESTRING and a POLYGON layer. How do I add nodes to the LINESTRINGS at any point that intersects the POLYGONS? (Preferably using SQL queries only. Temp tables are ...
0
votes
1answer
20 views

How to extract information from several shapefiles in the same time?

I'm using ArcGIS 10.2.1. I have a shapefile for 10 catchments and other three shapefiles for landuse, soil type and rock types. To extract the area of land use types, soil types or rock types for each ...
0
votes
0answers
9 views

Merge based on joined attribute in QGIS [duplicate]

I have a single layer of polygons (drawn around every zip code). I have a CSV file with territory numbers and the zip codes in each territory. I joined these and was able to color each territory ...
0
votes
1answer
23 views

Many pipelines and buffers need to display one at the time,

I have more than 1000 individual pipeline in one shapefile with 4 different buffer size. I wish to show one pipeline at a time with its corresponding buffers after each other in a very quick way. I ...
0
votes
0answers
5 views

How to convert between SWEREF99 TM (GRS80) and long-lat (WGS84) coordinate with JMapProjLib (Java version of Proj4)?

I'm making an android app which is reading SWEREF99 TM (GRS80) coordinates from a file, but I need to convert them to long-lat (WGS84) coordinates, and also in the oposite direction (WGS84 -> GRS80). ...
0
votes
0answers
3 views

What is the best way to view LAS data using free open source software? [duplicate]

Is there a pipeline for viewing, classifying, and processing LAS data using free open source software?
0
votes
0answers
5 views

How to resample a DEM from GCS to UTM with respect to reprojection bounds parameter?

When reprojecting a DEM (e.g., SRTM-derived 1-arc DEM) using PCI Geomatica for example, to constrain pixel size and maintain a square pixel you can either change the image extent or the number of ...
0
votes
0answers
16 views

Scripting Custom data setup functionality of Business Analyst using ArcPy?

Is it possible to script the "Custom Data Setup" functionality in the "Business Analyst" extension in ArcGIS using ArcPy? This functionality basically allows one to create a "Business Analyst ...
1
vote
0answers
8 views

In Mapbox Studio how do I make an image for a marker be 400 pixels without getting clipped off?

For Mapbox Studio, I've prepared this Squid drawing I'm going to put in a body of water, similar to the ships in the 'Pirates Return' map. I have sizes of the drawing in 100,200, and 400 pixels. ...
0
votes
0answers
17 views

Export from QGIS to Google Maps maintaining formatting

I'm totally new to QGIS so I'm not even sure this is possible. I've created a bunch of polygons within QGIS and they look just like I want them (color, transparency, etc.). What I'd like to do now ...
1
vote
0answers
12 views

Merge zip code based polygons to create sales territories

I have access the full data set of the KML file shown here: http://www.maptechnica.com/downloads/samples/mt_2014a_kml_us_zcta5_sample.tar.gz Here's what it basically looks like: ...
0
votes
0answers
11 views

Is there a QGIS equivalent to ArcGIS's Make OD Cost Matrix Layer (Network Analyst)? [duplicate]

I'm looking to create a OD cost distance matrix for a network data set I have created. Is there a way of doing this in QGIS which is akin to Make OD Cost Matrix Layer within ArcGIS's Network Analyst. ...
0
votes
0answers
11 views

How to map data from USGS NAS database, using HUC?

I am querying the USGS NAS (Nonindigenous Aquatic Species) database. The collection data for the results that are returned don't include lat/long points, but have an HUC (Hydrologic Unit Code). I have ...
0
votes
0answers
12 views

Creating Leaflet layer that can be toggled in layer control from CartoDB viz.json?

How do I create a leaflet layer that can be toggled in the layer control from a cartodb viz.json? I have read that the cartodb.createlayer does not create a leaflet layer. It seems you can add the ...
1
vote
0answers
6 views

QGIS Semi-automatic classification plugin install error on OS X 10.10: matplotlib.backends.backend_qt4agg

I have tried repeatedly to install the QGIS Semi-automatic classification plugin via both (1) Plugins > Install & Manage Plugins and (2) manually based on other comments I found here, but I ...
1
vote
0answers
18 views

How to get Geography data to GeoJSON in PostgreSQL?

I am using PostgreSQL database and there is a field in a table(area), i.e., public.geography(Points,4326). It contains below type of records "0101000020E6100000BA83D89942334540780B24287ED051C0" I ...
-1
votes
0answers
15 views

Check Geometry Type of a Shapefile Using GeoTools?

I want to get the type (point, line, or polygon) of shapefile using GeoTools but so far I haven't found any code. Any other Java library also works for me.
2
votes
0answers
10 views

How to create a custom input text in a CartoDB

What is the best way to modify the searbox listener searchbox in the CartoDB map? I would like to disable the default event listener for the CartoDB searchbox and first to execute my own listener and ...
0
votes
1answer
28 views

Loading Multiple CSV Files into PostgreSQL Table

I am having multiple CSV files. Those CSV files are the log files created as a result of running a windows batch file. The location of these CSV files lies on the server and i want all these CSV files ...
0
votes
1answer
20 views

ERROR: attempt to redefine parameter “postgis.backend”

I just install "SFCGAL". When I use "ST_3DIntersection", It get below error: ERROR: attempt to redefine parameter "postgis.backend" SQL state: XX000 How can I fix? I already saw ...
0
votes
0answers
14 views

What data formats & processes are available to store indoor maps? [on hold]

I'm beginning research into what my requirements are for storing indoor maps generated via a mixture of technologies. Surveying will likely be done by consuming location data produced by WiFi ...
1
vote
1answer
23 views

Can I make tiles of a raster in postgis?

I am doing some work on dtms in postgis. To import the dtm, I snipped it into tiles and the work directly on the dtm works fine. Then I calculated aspect and slope of the dtm and got some bad ...
0
votes
0answers
10 views

How can i use point layer as an impedance in Network Analyst?

I want to use traffic lights as an impedance for travel time in network analyst . the lights located in the intersections . I have to use multimodal network based on this question How can i create ...
0
votes
0answers
16 views

Using bus line and bus stops to create network dataset

I have two shp files: bus stops and bus lines. Currently I want to create a network dataset based on these two. The bus line is the central line of the road. The bus stops all lies on the bus line but ...
3
votes
3answers
37 views

How to georeference a map in UTM / WGS 84 (geographic) to WGS84 / UTM?

I have scanned UTM WGS 84 toposheets, with a geographic grid. I want to georeference them in WGS 84 / UTM (therefore with UTM coordinates). Should I: Calculate the UTM coordinates from the ...
1
vote
3answers
56 views

What is a term to describe a latitude OR longitude value but not both together?

I have a location of north 45 degrees, west 90 degrees. This is the coordinate of the point. What is each component of this coordinate called? I'm looking for a generic term to describe either ...
0
votes
1answer
27 views

Converting polyline data to polygons?

I am trying to convert some polyline coastline data into a polygon that I can use to clip/subset back other data sets by this polygon. There are some small gaps in the coastline data, which ...
1
vote
1answer
13 views

Returning list of field names in joined table using ArcPy?

I need to look at all the fields in a joined table performed through arcpy. I am instigating for fields in arcpy.Listfields(Feature): print fields but it is returning a large list of: ...
0
votes
1answer
12 views

ArcGIS Javascript API AMD require syntax and Dojo ContentPane compatibility

I am trying to recreate the ArcGIS Javascript API/Dojo ContentPane layout template shown here for my own custom application. I would like to switch from using dojo.require() legacy syntax to using AMD ...
0
votes
1answer
10 views

Toggling Layers using CartoDB

Does anyone have ideas or know how one might be able to use CartoDB to create a map that one can toggle the individual features within a KML file, as currently happens on this map? I want my users ...
2
votes
1answer
31 views

Calculating Percentiles in ArcMap?

I have a large polygon dataset (26,000) records with numerous attributes columns. I wish to calculate the percentile rank of each attribute. Say I have population_density in an attribute, is there a ...
0
votes
0answers
18 views

Data dots aren't showing up (Cartodb)

If I connect to my campus network, the map is not showing any data dots. And from the screenshot you can see the error messages. If I use any other network, for example using my phone's hot spot ...
1
vote
1answer
12 views

Select by location are within source layer

So I am trying to select all of the block groups inside a group of counties. So I am using the select by location tool and setting my target layer as the block group and my source layer as my ...
0
votes
1answer
26 views

Finding all ways that are partly within a bounding box

I'm trying to write a query that will return all OSM ways which are contained within a bounding box of min/max gps coordinates. I get these cooridinates from the greater london bounding box on ...
2
votes
2answers
28 views

Enforcing unique values in field when editing in ArcMap?

I am working on a geodatabase. In some of my features, I would like to add a field, in which I will type the values on my own. On this field no duplicates must be allowed. In other words I want it to ...
0
votes
1answer
11 views

Converting SWEREF99TM coordinates to the “standard” coordinate system (longitude and latitude)

I recently asked a question about a coordinate system in a file, and found out that it used SWEREF99TM, but I can't figure out how to convert those coordinates to the "geographic coordinate system". ...
0
votes
2answers
24 views

Calculate mean elevation over a region

For the purposes of spatial interpolation, I have created a grid using "Create Fishnet" in ArcMap10.2 (I use the "label points", which have a spacing of 0,00833333 degrees). For every point (label ...
0
votes
0answers
5 views

Water utility editing rules

I am looking for some help related to editing water utilities in ArcMap. I understand that most water editing rules, and procedures are similar, and I am looking for any help with this. I will of ...
0
votes
1answer
23 views

Plotting an eia shapefile in google maps with R?

I'm trying to plot a eia shapefile onto google maps. I have a code working with the map funciton but can't get it to work with the ggmap function. Where am I going wrong? Working code: ...
0
votes
0answers
7 views

Base height information is lost when I create a Scene Package

I am using ArcScene 10.2.2 When I create a scene package, and then unpack it, I lose any base height information I have given to layers in the package, which I have draped over TINs. I get the Error ...
0
votes
0answers
19 views

Is it possible to insert Excel table with filter in ArcMap layout view?

Please see the image (https://apps.health.ny.gov/statistics/environmental/public_health_tracking/tracker/mapaction.map?activeTool=showIndicator&indicator=asthma). There are "Map display" and ...
1
vote
1answer
36 views

QGIS Google Maps Coordinate System

I have some Points in Shapefile with BC Albers Coordinate Syetem and I need to Project them to Google Maps Lat and Long. I tried to do this by using WGS 84 / Pseudo Mercator EPSG: 3857 and ...
0
votes
2answers
74 views

Renaming filenames to a standard filename format using Python

I am working within an ESRI ArcGIS environment. I have a folder full of .xyz files that are named to a specific old file format such as 2014516_MS_005.xyz I want to be able to loop through the whole ...
1
vote
2answers
30 views

Getting number as parameter to use in SQL expression leads to ExecuteError: ERROR 000358?

In my script I am using the Select tool (arcpy.Select_analysis) and in the SQL expression, I want to use a number that I call in as a parameter. I have trying to script it like: subsize = ...
1
vote
0answers
9 views

Coloring multilinestringzm M values in QGIS

I have output from a geophysical technique that produces X,Y,Z and scalar value for millions of points, which have been stitched together appropriately (by networkx if it matters) into ...

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