0
votes
0answers
3 views

How do I make a search by area possible?

In my current Nominatim system I want to be able to search by ways that are polygons and have a specific tag (let's say, banana). How can I make this possible? At the moment, the ways I import are ...
0
votes
0answers
2 views

Syncing modifications between two vector datasources

I work for a small business that offers field biology/ecology services. We want to modernize the way we collect data on the field. I discovered apps like MapIt and Roam. I installed MapIt on my ...
1
vote
0answers
3 views

ArcGIS Pro - how can I filter on a relate?

I've created a relate in ArcGIS Pro - joined a shape layer to a table on a key. ArcGIS Pro says it has gone through okay, and when I click on a feature I can go down into the information displayed and ...
0
votes
0answers
3 views

Help loading this REST Service in QGIS

How do I load this REST service in QGIS? https://tpwd.texas.gov/arcgis/rest/services/GIS/Ecosys1/MapServer The ArcGIS REST API Connector returns the error: [Errno 1] _ssl.c:504: error:14090086:SSL ...
0
votes
0answers
5 views

Converting WGS84 to UTM coordinates using R package gstat?

I want to convert WGS84 to NZGD2000 using R package gstat but I cannot get the right result. # Define the coordinate systems wgs_co <- data.frame(lon=x, lat=y) coordinates(wgs_co) <- ...
0
votes
0answers
9 views

Updating dataset in Carto? [on hold]

I'm building a system where our users periodically add data to the system - it's "almost never" an update, but an ADD. If I was writing this in T-SQL or something I would create a temporary table ...
-2
votes
0answers
15 views

Line density map in Arcmap

I want to use Line Density tool in Arcmap for my data and it is important for my study to consider all lines exist in each searching radius. I don’t want to consider each line once! I want density of ...
0
votes
0answers
9 views

Arrow pointing to something beyond the extent of the map

I have added a point feature class to a map I am making. The points are, for the most part, rather clustered together and all fit within the extent of my map--except for one single point, which is ...
0
votes
0answers
13 views

Clip a tiff raster image using a bounding box with python

I would like to know how can I clip a raster image using a bounding box in python. It is possible for the output pixels to be exactly in the same place as the originals. I have tried to clip a raster ...
0
votes
0answers
5 views

Missing qgis icon resources for symbology dialog

I'm trying to call QgsRendererV2PropertiesDialog from a standalone Qgis python script. It mostly works, except there's some "unknown error" messages related to SVG files when I trigger the dialog: ...
0
votes
0answers
4 views

Calculating polygon area or sphere surface area after knowing vincenty distance between start geo stamp and current point?

I'm really new to GIS, so I'm asking a basic question. I've already got the Vincenty Distance between start geo stamp and current point. Since I also want to implement a triangulation or ...
1
vote
1answer
18 views

Symbolizing by color names in ArcMap?

I have a shapefile with two fields, lets call them shape and color. I want to symbolize each point based on both of those fields. Each field is stored as a string. Example: "Square, Blue". I want to ...
0
votes
2answers
24 views

Understanding AutoCAD to ArcGIS conversion data limits?

I'm working to transition some of our data from CAD to GIS by bringing it in by adding the .dwg file to ArcMap itself and remapping using the DWG as a guide. I was wondering if there was a limit as to ...
0
votes
1answer
10 views

Recommended NoData value for DEM/DTMs created using gdal

Background info: I've been generating some raster DTMs from vector points using gdal_rasterize, and was wondering if there is any consensus as to what is the best NoData value to use. The Python GDAL ...
2
votes
0answers
18 views

Pixel based Regression

I have 80 .tif files, and each pixel value represents NDVI. The whole stack of images is a time-series. I want to run a regression for each pixel using NDVI and time. I have tried to approach this ...
0
votes
0answers
12 views

narrowing down to single FIP [on hold]

I have a researcher with lat and long coordinates from the US. She would like to get the corresponding FIPs so that the data can be linked to US Census. I found an API that is able to return the ...
0
votes
0answers
12 views

Add attribute value from a Point layer to a Line layer in QGIS

I have extracted nodes from a line shapefile. On these nodes, I have extracted altitude values from a raster DEM using SAGA 'Add raster value to point'. I want now to make the inverse of the first ...
1
vote
0answers
12 views

PostGIS: Select Certain Columns returns Blanks

So I have a pretty stupid question. Suppose I have a table of the US called us_states. I created two new tables called wy_test which is created using CREATE TABLE wy_test AS SELECT * from us_states ...
0
votes
0answers
5 views

Include openlayers script in wordpress

I'm working in a wordpress project. I want to include a script from openlayers as a comment or post. Any help would be appreciated.
0
votes
0answers
6 views

How to take elevation into account in the haversine formula?

I know that I can use the haversine formula to find the great circle distance between two points specified as lat/lon pairs. Is it possible to integrate elevation into this calculation? I am ...
0
votes
0answers
4 views

GeoTiff to Kmz conversion problem

How can I change the color "white" to "transparent" in a geotiff file so it's not displayed when I import it in Google Earth ?
0
votes
0answers
8 views

What are the significant differences between SpatiaLite and Geopackage? [on hold]

SpatiaLite and GeoPackage are both based on SQLite. Both are supported by ArcGIS and GDAL (and therefore all projects that rely on GDAL, such as QGIS and R). I would like to adopt one as the default ...
0
votes
0answers
15 views

Spatial Query tool for Mapbox

I’ve using Mapbox Studio to create a web map that’ll allow a user to interact with some basic parcel data. I’m looking to add a basic spatial query tool for the user so that they can apply spatial ...
0
votes
0answers
19 views

NameError when attempting to auto increment field with python script [on hold]

I am getting the following error when trying to run my code and I am not sure why: NameError: global name 'rec' is not defined Here is my code: field = "id_num" rec=0 def autoIncrement(): ...
0
votes
1answer
20 views

Union PostGIS tables turns blank

I have a simple tasks that regarding combining multiple Postgis tables. Let's say I have 4 tables called tx_shape, ca_cd_1_shape,wy_shape, and ma_suffulk_co_shape. Two of which are states, one is a ...
0
votes
1answer
20 views

National Map downloading wrong coordinates?

Edit 2 I figured out the problem. The download is a whole panel in the ballpark of 50 miles x 50 miles. The bounding box I requested was about 3x3 miles. My BB is a subset of the whole dataset that ...
1
vote
1answer
18 views

Converting double field to integer in database view so ArcMap query layer can use field as unique identifier?

I have a field in a table that is a double data type, but the values are actually integers. The table is from third-party software, so I don't have control of the field data types. I'm attempting to ...
0
votes
1answer
13 views

Return closest element in GeoSeries

Is there any built-in function or quick hack to efficiently return the closest element (index) to a point for a given geopandas GeoSeries? Something like >> geopandas.GeoSeries( >> { ...
0
votes
0answers
5 views

keep dijit menuitem open after select

I have a table of contents (TOC) with a legend that allows me to turn on/off layer in my map. I placed my the TOC in a dijit menubar across the top of my page. When I make a selection from the TOC to ...
1
vote
1answer
9 views

random sample of raster cells based on multiple classes in R

I have a raster dataset that is classified into vegetation classes. I would like to randomly sample from the dataset based on the vegetation classes, but not sure how to do it. Here is some example ...
0
votes
0answers
20 views

Dasymetric mapping in QGIS?

I have the following shape layers: Rivers.shp NaturalArea.shp CountyBoundary.shp And I have a Census table showing the population count within the county. Now obviously nobody lives in a river or ...
1
vote
0answers
29 views

Why does QGIS 2.16 have longer load times than 2.8, especially working with tables?

I was previously running an LTR version of QGIS (2.8.9 I think). I installed 2.16 and found that opening tables takes a very long time. Deleting columns in tables now takes hours as opposed to seconds....
0
votes
0answers
2 views

Add Scale Overlay template gxp OpenGeo suite sdk

I need to add the scale on the map, it is assumed that .js is in the Widgets folder, that means that I should add as Plugin, maps and layers I have this code put in app.js: map: { id: "mymap", // id ...
1
vote
0answers
10 views

Generate a map image file from tiles and features

I am looking for a way to generate images (e.g. png) from a tile source with features added on top of the map, without user interaction or requiring a browser. Currently, I am able to create a ...
0
votes
1answer
22 views

Add dynamic text from external source?

I am developing some templates for my office and would like to pull information from an external source that will be displayed in the marginalia as text boxes or similar objects. A product request ...
0
votes
1answer
17 views

qgis2web Plugin Broken?

After the qgis2web plugin was upgraded last week the popup window shows all fields in the attribute table when you click on a feature regardless of which ones were selected in the dropdowns when ...
0
votes
1answer
17 views

Filling table matches multilayer from buffer in PostGIS?

I have some tables in Postgis of differents geometries (Points, Lines, Polygons). I create a buffer of 1 kilometer of one point with this: ST_Buffer(ST_GeomFromText('POINT(3056563.45195278 804692....
1
vote
1answer
17 views

Parsing error: in Conditional raster calculator?

I was trying to calculate Soil types based on the FAO's guidline using the Con tool in raster calculation with ArcGIS 10.3. from three layers (silt, clay & sand). But, I got an error saying: ...
2
votes
1answer
27 views

Feature Class to Shapefile with Definitions not Values

I have a point feature class in an SQL Server Geodatabase that we use for day-to-day analysis. Occasionally we receive request for copies of our data from the public and send them shapefiles. If I ...
0
votes
0answers
7 views

Error while creating development user CartoDB

While creating development user I get this error: [pool] Found a connection for localhost:cartodb_dev_user_ec9cc5c4-2863-4fc6-acbf-95bcb52ea902_db:5432:postgres:sequel (4) (0.000178s) BEGIN PG::Error:...
2
votes
0answers
8 views

OpenLayers 3: Geometric OGC filters

How do I generate geometric OGC filters for use in a WFS GetFeature request such as: <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc"> <ogc:Intersects> <ogc:PropertyName&...
0
votes
0answers
29 views

Shortest path between some points in QGIS

I'm using QGIS software to calculate shortest distance between 750 points (rental stations of the bike sharing of London) on OpenStreetMap. The lines should follow the streets of the map downstairs. ...
0
votes
1answer
15 views

Legend symbol size- ArcGIS 10.3.1

I work with point layer in this size in the map: When i create a Legend, the symbol size is to big: I try to avoid from solve this issue by: decrease the symbol size in the layer properties. ...
0
votes
0answers
13 views

“Change Version Dialog box” does not show all versions

I just upgraded to ArcMap 10.3.1 and have gotten all of my database connections set back up. I'm trying to change the version I'm editing under the "List by Source" view but I'm only seeing two ...
1
vote
0answers
15 views

Supervised Random Forest in R

I did an image classification using random forest algorithm in R. I got the result but I do not understand what does the confusion matrix shows ? I mean what does the rows and column show? These are ...
2
votes
0answers
32 views

Determining the first and last point that a polygon intersects

I have this... And I want to join those attributes to the polygon automatically: Because I'll have to replicate this on tones of those polygons. If this works I would like to know if it still ...
0
votes
0answers
10 views

Does frequency of sampling GPS on a smartphone affecting the quality (accuracy) of the samples?

In Android and iOS dev frameworks usually when sampling GPS one specify the sampling rate in milliseconds. Theoretically it can be from even 10 milliseconds up to once in a-5 minute. My question is ...
0
votes
0answers
12 views

Troubleshoot with “Split selected features with selected line from another layer”

I am trying to use the "Split selected features with selected line from another layer" tool from the plugin Digitizing Tools in QGIS. Sometimes, this tool works with my shapefiles but sometimes it ...
0
votes
0answers
5 views

QGIS Server Returns Blank Page on Windows 7

I have installed QGIS Server through OSGEO4W. I followed the instructions the instructions on this page. This link shows me the GetCapabilities xml text. So far so good. http://localhost/qgis/...
0
votes
0answers
13 views

Importing shapefiles into AutoCAD?

When I import a shapefile into Civil 3D 2014 my attribute fields are adding three more significant figures to the end of my values. I have played around with the precision and scale and between float ...

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