0
votes
2answers
194 views

town, village, prefecture shapefiles for China?

I'm looking for boundary files for towns, villages and prefectures in China that are free. I've came across http://chinadataonline.org/, but they are limited. Can anyone tell me where to look?
13
votes
5answers
16k views

Creating point file along line (trail) at regular distances (0.20 miles) using ArcGIS Desktop?

I'm using ArcGIS 10.1. I have a trail network that I'm trying to establish signs along the trails every 0.20 miles. Is there a way to create the point file from the line feature?
1
vote
2answers
85 views

Leaflet output is grey

I would like to implement leaflet in shiny with R. I try to go with the simple examples I found online: library(leaflet) library(ggmap) somePlace <- ggmap::geocode("Vienna") # Information from ...
1
vote
2answers
26 views

Backup GIS data on postgis database from pgadmin3

I am using a postgis database with qgis and managing it with pgadmin3 I have already investigated the backup/restore options within pgadmin 3 and done one test run on one database I am wondering if ...
1
vote
1answer
20 views

Spatial correlograms for binary raster?

I have binary raster data (deforestation hotspot or not) that I would like to plot spatial correlograms for in R, to look at spatial autocorrelation over different spatial lags. I came across this ...
1
vote
2answers
1k views

How to add Attachment to an object in ArcGIS Online?

I created attachments for some objects of a theme (as a File Geodatabase Feature Class) in ArcGIS 10.0: images (JPG) and doc files. Then moved the same shp theme in my web-map of ArcGIS Online, and ...
1
vote
1answer
21 views
+50

Where to get world-map images for use in webglearth

I am using webglearth for a 3D earth globe. I already bought MapTiler, from the same makers. Now I am struggling with finding different world-map-images with the right projection. I need either WGS ...
1
vote
1answer
15 views

CartoDB: Geometry code too long, Excel can't handle it

I am working on a map of regions where I want to be able to visualize some simple numbers on a periodical basis. I have a dataset with the polygons . However those are so detailed (the geometry is ...
1
vote
0answers
15 views

QGIS not loading default layer style from PostgreSQL database on startup

I have saved a vector layer style to my PostgreSQL database source. I then amended the layer_styles table record for the relevant layer by editing the styleqml field (just changed the outline_width ...
0
votes
0answers
9 views

FindTask does not work - 304 not modified

I use 3.16 and I have got some problem. When I try to execute FindTask require(["esri/tasks/FindTask", "esri/tasks/FindParameters"], function (FindTask, FindParameters) { ...
0
votes
0answers
11 views

Markers display with leaflet and javascript

I have a problem displaying data relating to schools on a div 'info' when click the marker with leaflet and javascript: here's the error: Uncaught TypeError: layer.setStyle is not a function
-1
votes
0answers
13 views

condition that displays two div different with leaflet [on hold]

I wanted to create a condition that displays each time according to different div click on the data on the map
0
votes
0answers
22 views

Cell by cell Raster Analysis [on hold]

I have five rasters of suitable cropping areas for five crops. I am thinking of doing cell by cell analysis to see if in each cell five crops are suitable or any crop having high cell value should be ...
3
votes
2answers
43 views

FME - Copying a full list of 'user attributes'

I'm new to FME, so just getting used to the interface. I've loaded a template .fmw which has given me a full process, including an example 'Writer'. This writer is no use to me, and as I can't change ...
1
vote
0answers
381 views

GeoEXT using WFS-T draw on point Layer

Hello this is my first post. I'm new with openlayers and geoext and i'm facing a problem while trying to add a new record in a point layer via wfs-t the code is below (it is from ...
0
votes
0answers
3 views

Exporting Map View to PDF in Google Maps API

I have a web application that uses Google Maps API. I want to be able to export reports that include the current map view. Is there a tool/service that will allow me to accomplish this?
0
votes
1answer
102 views

How can I add vector tiles to my tileserver?

I created my own tileserver under ubuntu 12.04 as described here: http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/ now I want to serve the tiles as vectors, I found this: ...
0
votes
1answer
272 views

What to use as split field or target workspace with Split tool?

I'm trying to use the split tool in arcgis 10.1 but I dont know what I should use as the split field or my target workspace. W:\S&P\s&p techs\Emily\Geodatabase\Geodatabase.gdb this is what I ...
-4
votes
0answers
3 views

GeoExt:make wfs layer [on hold]

Can u help me with WFS on GEOExt ? i try this tutorial http://workshops.opengeo.org/geoext/wfs/grid.html it's work but point is not saved!! someone know the probleme ?
0
votes
0answers
8 views

Vector tiles to MBTiles

I need some clarification regarding MBTiles. I am generating MBTiles in 2 different ways: Using TileMill Using Mapbox tm2 to MBTile using TileCloud In TileMill, does the exported MBTile contain ...
1
vote
1answer
99 views

Shifting LiDAR point clouds that have been incorrectly georeferenced

I am new to LiDAR and have never been a part of the LiDAR data pre-processing stage and hence, this question. I have two LiDAR point clouds (.las files) of a densely forested area that were captured ...
4
votes
2answers
2k views

How to calculate midpoint given north/south latitude and east/west longitude?

First, sorry if this questions sound very simple. I am very new to GIS. Given four values of north/south latitude, east/west longitude how to calculate the center point that is correct for all cases ...
2
votes
0answers
23 views

PostGIS crosstab on multiple point tables

I have several point tabels, lets say 3. Tables are alike with two column: a integer value and a geometry like: table sand1 (value int, geom geometry) table sand2 (value int, geom geometry) table ...
0
votes
0answers
11 views

Changing validity length of existing ArcGIS Server token?

I need to change the length of validity for a token in AGS 10.3.1. Is this at all possible? For some reason my token ran out after 24 hours - probably because I set the time too long. It would be ...
2
votes
1answer
450 views

Python script for dark object subtraction on Landsat 8 Imagery

Does anyone know of any python scripts that will allow me to conduct such a process? I am limited to open source software and have minor experience in Python.
0
votes
2answers
30 views

Toolbox blank when sending to someone else?

I have a toolbox with two models that I am trying to send to someone else. I am working in 10.4 and he is working in 10.3. I save my toolbox as a 10.3 toolbox and send him the .tbx file, but when he ...
17
votes
11answers
25k views

Exporting feature class into multiple feature classes based on field values using ArcGIS for Desktop?

I have a feature class with over 2,000 features, and I need to make them all individual feature classes based on a field. I know there has to be a way to do this, but I just can't figure it out! ...
8
votes
1answer
4k views

Mathematics behind converting scale to resolution?

I have a ArcGIS service configured as shown in this pastbin. Specifically, the first LOD looks like this: { "level": 0, "resolution": 222.2222222222222, "scale": 256000 } I determined how ...
1
vote
1answer
33 views

QGIS line cross a polygon

In QGIS I create a line that crosses a polygon twice. By using intersection, it will create a new shape file that gives me as a result two visible lines (the polygon cut the line). With geometry ...
1
vote
2answers
965 views

Using snap point when using measurecontrol in OpenLayers?

I have a problem about measurecontrol. I can use measurecontrol and I can show length to use measure control . But my problem is that I didn't use in snap because measurecontrol is a control, not a ...
1
vote
2answers
37 views

QGIS place labels next to the beggining or ending points of Linestrings but above the Linestring

I've got a Linestrings layer. Each Linestring has among other fields, these ones: id ENTRY EXIT 1 S1 E2 2 S1 E3 3 S1 E3 4 S1 E3 5 S1 E3 6 S1 E1 7 ...
1
vote
0answers
19 views

Per-pixel Descriptive Statistics through multiple Raster layers

I'm looking for computing different descriptive statistics through a set of raster layers. I need to make it with a python script capable of running into a standalone tool within the QGIS. To do so ...
0
votes
0answers
14 views

run shp2pgsql command in c# application

I worked for a month on this command but in vain ; really if someone already tried to help me find the error , because when I load the application displays the message to me as the shapefile was ...
0
votes
0answers
8 views

Telerik GridView issues with ArcMap

i'm using Telerik Controls , my issue is that when my application running as a plugin inside ArcMap application it doesn't work smoothly . for example :- when using the search functionality provided ...
2
votes
1answer
36 views

Why aren't my integer columns available for graduated styling?

I have a layer with graduated styling based on an integer column. When I duplicate the layer to make a similar styling based on another integer column, none of the columns are available for graduated ...
1
vote
3answers
6k views

Convert geometry to latitude-longitude using PostGIS ST_Transform

My table has a geometric field, in EPSG:3857, of type point. I need the latitude and longitude, in EPSG: 4326, of each point. Could someone give me a valid example of how to use ST_Transform().
1
vote
1answer
27 views

Hyperspectral Imaging - Material spectral signature

I am reading about the working principles and applications of hyperspectral imaging (HSI). In this link, the uses of HSI over the range of the wavelength, from visible to longwave infrared have been ...
1
vote
0answers
37 views

Change coordinate system to add buffer in meters

I have am trying to add functionality to allow users to find points that are within a buffer distance inside or outside the parameter of a polygon. The map is in IProjectedCoordinateSystem so to my ...
0
votes
1answer
180 views

arcpy.mapping.Export creates some labels but not others

I've created a simple python toolbox (pyt) to export map layouts to multiple formats. My problem is that some labels which are defined in the layout are exported, but others are not. For example ...
1
vote
1answer
50 views

Tableau: Using UK Shapefiles in PostGIS Database

I'm trying to use Tableau to display data. Some of this data is suitable for mapping, and therefore I'd like to create maps in Tableau to display this data. Unfortunately, neither the basic view nor ...
1
vote
1answer
9 views

How to create a script using wgrib2 command

I have several model data with the following format postwrf_d01_YYYYMMDD_INIT_f00000.gr2 where INIT = 0000, 0600, 1200, 1800, each consisting of up to several hours of forecast (f00000 to let's say ...
1
vote
0answers
119 views
+50

SecurityError when Export map to PNG

I try to export my map to picture with the same method like this example of OpenLayers 3. The problem is whith few baselayers, the function doesn't work and firebug say : What can I dos for ...
0
votes
0answers
6 views

Custom feature search functionality in story map, Map tour template [on hold]

I am new in ArcGIS java script API. I need to add a search widget in ArcGIS story map, map tour template Can any one help me.
2
votes
1answer
7 views

Is there a standard way to show navigability of waterways?

Is there a standard way to indicate whether a river is navigable? Even better, are there standard ways of showing various grades of navigability (accessible to small craft only, accessible to deep ...
3
votes
2answers
106 views

Automatic numbering of points during digitization in QGIS?

Does somebody know how to automatically number the points during digitization in Qgis. To explain, when I create the new point there is the window where I must to type the point number. Is there any ...
1
vote
2answers
664 views

How to intersect FeatureCollections in turf.js efficiently?

I've been playing around with turf.js and I'd like to use turf.intersect to intersect two datasets. My raw data are two polygon shape files so I converted them to geojson. I then tried to use ...
0
votes
1answer
8 views

Leaflet push GPS position to array onLocationFound and search a squared area around this position

So I have this approach of pushing the coordinates of a location to an array: var gpsposition = [], function onLocationFound(e) { gpsposition.push(e.latlng);} Now I have the following questions: ...
5
votes
1answer
1k views

Calculating distance in WGS84 (MySQL and Geoserver)

Here is the environment in which I work: An application using geo-referenced data Database MySQL 5.5, storing georeferenced points A Geoserver server, connected to the MySQL database Here is the ...
2
votes
0answers
31 views

How do I change the pixel values of raster data from QGIS python plugin

I have been trying my hand at a QGIS plugin. The plug in reads raster layer data into an array, pipes the data to a C++ program, does processing over there, and pipes my results back. After a couple ...
0
votes
0answers
18 views

WFS search by PosX and PosY coordinates [on hold]

Is it possible to search on coordinates(pos Y, pos X) on an object in the WFS webservice? Output WFS service (2.0): <wfs:member> <bag:huisnummer>52</bag:huisnummer> ...

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